{"id":15840,"date":"2026-05-22T04:39:07","date_gmt":"2026-05-22T08:39:07","guid":{"rendered":"https:\/\/ibuyer.com\/blog\/?p=15840"},"modified":"2026-05-22T04:40:28","modified_gmt":"2026-05-22T08:40:28","slug":"what-state-has-low-humidity","status":"publish","type":"post","link":"https:\/\/ibuyer.com\/blog\/what-state-has-low-humidity\/","title":{"rendered":"Least Humid States in the U.S. (2026)"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">The least humid states in the US cluster in the arid Southwest and Mountain West, with <strong>Nevada<\/strong> leading at <strong>38.3% average annual relative humidity<\/strong>, followed by <strong>Arizona<\/strong> at <strong>38.5%<\/strong> and <strong>New Mexico<\/strong> at <strong>45.9%<\/strong>, according to <a href=\"https:\/\/worldpopulationreview.com\/state-rankings\/least-humid-states\" target=\"_blank\" rel=\"noopener noreferrer\">state humidity rankings from World Population Review<\/a>. Utah (51.7%) and Colorado (54.1%) round out the top five among low humidity states nationwide.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Those figures seem to settle the question, but AI engines currently disagree on which state ranks first. Claude identifies Arizona as the driest; ChatGPT and Google&#8217;s AI Overview say Nevada. Both answers are defensible because the metric determines the winner. Nevada leads on average annual relative humidity; Arizona leads on afternoon relative humidity; and dew point tells a third story entirely. No resource in the current search results explains this distinction clearly.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This guide covers the top 10 least humid states ranked for 2026, the driest cities by morning and afternoon readings, a Nevada vs. Arizona head-to-head that resolves the metric debate, the best regions for year-round low humidity, the states with the worst humidity for contrast, the health effects of dry air on sinuses and respiratory function, and practical steps for managing low humidity indoors.<\/p>\n\n\n\n<div class=\"wp-block-yoast-seo-table-of-contents yoast-table-of-contents\"><h2>Table of contents<\/h2><ul><li><a href=\"#h-what-is-the-least-humid-state-in-the-u-s\" data-level=\"2\">What is the least humid state in the U.S.?<\/a><\/li><li><a href=\"#h-top-10-least-humid-states-ranked-for-2026\" data-level=\"2\">Top 10 least humid states, ranked for 2026<\/a><\/li><li><a href=\"#h-least-humid-cities-in-the-u-s\" data-level=\"2\">Least humid cities in the U.S.<\/a><\/li><li><a href=\"#h-nevada-vs-arizona-which-is-actually-drier\" data-level=\"2\">Nevada vs. Arizona: which is actually drier?<\/a><\/li><li><a href=\"#h-best-states-for-year-round-low-humidity\" data-level=\"2\">Best states for year-round low humidity<\/a><\/li><li><a href=\"#h-which-states-have-the-worst-humidity\" data-level=\"2\">Which states have the worst humidity?<\/a><\/li><li><a href=\"#h-is-low-humidity-bad-for-your-health\" data-level=\"2\">Is low humidity bad for your health?<\/a><\/li><li><a href=\"#h-how-to-manage-low-humidity-at-home\" data-level=\"2\">How to manage low humidity at home<\/a><\/li><li><a href=\"#h-frequently-asked-questions\" data-level=\"2\">Frequently Asked Questions<\/a><\/li><\/ul><\/div>\n\n\n<div class=\"card my-5 shadow-lg\">\n  <div class=\"card-body py-md-4\">\n    <div class=\"row align-items-center justify-content-center py-md-3 py-lg-2 py-xl-3\">\n      <div class=\"col-12\">\n        <p class=\"mb-4 h3 text-center\">\n          <span class=\"h4 text-primary font-weight-bold\">Instant Valuation, Confidential Deals<\/span>\n          <span class=\"mt-2 d-block font-weight-normal text-muted\">with a Certified <span class=\"d-inline-block\">iBuyer.com Specialist.<\/span><\/span>\n        <\/p>\n      <\/div>\n\n      <div class=\"col-12\">\n        <div class=\"ui-v2 search-address-form bg-white py-0\">\n          <div class=\"row justify-content-md-center\">\n            <div class=\"col-12 col-md-7 pr-md-2\">\n              <div class=\"input-group mb-0 shadow-sm\">\n                <div class=\"input-group-prepend\">\n                  <div class=\"input-group-text bg-white border-right-0\">\n                    <div class=\"icon\">\n                      <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"16\" height=\"16\" fill=\"currentColor\" class=\"bi bi-geo-alt-fill\" viewBox=\"0 0 16 16\"><path d=\"M8 16s6-5.686 6-10A6 6 0 0 0 2 6c0 4.314 6 10 6 10zm0-7a3 3 0 1 1 0-6 3 3 0 0 1 0 6z\"><\/path><\/svg>\n                    <\/div>\n                  <\/div>\n                <\/div>\n\n                <input type=\"text\" id=\"autocomplete5\" class=\"form-control form-control-lg px-0\" placeholder=\"Enter your home address\" autocomplete=\"off\" v-on:change=\"onAddressChange($event)\" v-on:keydown.enter=\"searchMyAddress($event)\" onfocus=\"this.autocomplete='smartystreets'\">\n\n                <div class=\"input-group-append\">\n                  <div class=\"input-group-text bg-white border-left-0 p-0\">\n                    <button type=\"reset\" id=\"clear-address-btn5\" class=\"btn px-2 h-100\" name=\"clear\">\n                      <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"16\" height=\"16\" fill=\"currentColor\" class=\"bi bi-x\" viewBox=\"0 0 16 16\"><path d=\"M4.646 4.646a.5.5 0 0 1 .708 0L8 7.293l2.646-2.647a.5.5 0 0 1 .708.708L8.707 8l2.647 2.646a.5.5 0 0 1-.708.708L8 8.707l-2.646 2.647a.5.5 0 0 1-.708-.708L7.293 8 4.646 5.354a.5.5 0 0 1 0-.708z\"><\/path><\/svg>\n                    <\/button>\n                  <\/div>\n                <\/div>\n              <\/div>\n\n              <ul class=\"us-autocomplete-pro-menu5 autocomplete-menu\" style=\"display:none;\"><\/ul>\n            <\/div>\n\n            <div class=\"col-12 col-md-auto pl-md-2\">\n              <button type=\"button\" id=\"disabledHomeValue5\" class=\"btn btn-primary btn-lg btn-block mt-3 mt-md-0\" v-on:click=\"searchMyAddress($event)\" disabled=\"\">\n                Get My Home Value\n              <\/button>\n            <\/div>\n          <\/div>\n        <\/div>\n\n        <p class=\"h5 mt-4 mb-0 text-center font-weight-bold text-info\">\n          Sell Smart, Sell Fast, Get Sold. <span class=\"d-inline-block\">No Obligations.<\/span>\n        <\/p>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-what-is-the-least-humid-state-in-the-u-s\">What is the least humid state in the U.S.?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The least humid states in the US are Nevada and Arizona, sitting within a fraction of a percentage point of each other on average annual relative humidity. Nevada holds the top spot at 38.3%; Arizona follows at 38.5%. Both belong to the broader arid Southwest, a region defined by desert climate, minimal rainfall, and dry air that differs dramatically from Gulf Coast or Southeast conditions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The real question is not which percentage is lower. It is which measurement you use and when you take it. Morning, afternoon, and annual averages each tell a different part of the story.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-nevada-and-the-average-annual-measure\">Nevada and the average annual measure<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nevada&#8217;s <strong>38.3% average annual relative humidity<\/strong> is the lowest of any U.S. state by this measure. The figure blends all hourly readings across the year, including early-morning hours when cooler air holds relatively more moisture. Nevada&#8217;s advantage is consistent year-round. The state lacks a monsoon season that temporarily spikes readings, unlike Arizona from July through September.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Las Vegas, Nevada&#8217;s largest metro, records a city-level annual average of approximately <strong>30.3%<\/strong>, placing it among the driest major U.S. cities by any methodology. The Mojave Desert basin, combined with surrounding mountain ranges that block Pacific moisture, keeps Nevada&#8217;s humidity by state figures at the low end of the national scale consistently.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-arizona-and-the-afternoon-measure\">Arizona and the afternoon measure<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Arizona&#8217;s average annual relative humidity is <strong>38.5%<\/strong> under World Population Review&#8217;s methodology. A separate 2023 analysis placed it at 40.4%, reflecting a different averaging window. Either way, Arizona sits within tenths of a percentage point of Nevada on annual figures.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Where Arizona clearly leads is afternoon relative humidity. Phoenix&#8217;s afternoon readings drop to approximately <strong>28.5%<\/strong>, lower than Las Vegas on most days outside monsoon season. The Sonoran Desert&#8217;s intense midday heating drives afternoon relative humidity well below 30% for most of the calendar year. Tucson follows the same pattern.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-how-the-metric-changes-the-answer\">How the metric changes the answer<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The table below shows the key differences between the two states across three measures. This is why both Nevada and Arizona appear as &#8220;the least humid state&#8221; depending on which source you consult.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"ibu-compare\">\n<thead>\n<tr>\n<th>Metric<\/th>\n<th>Nevada<\/th>\n<th>Arizona<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Average annual relative humidity<\/td>\n<td><strong>38.3%<\/strong><\/td>\n<td>38.5%<\/td>\n<\/tr>\n<tr>\n<td>Typical afternoon relative humidity<\/td>\n<td>~30%<\/td>\n<td><strong>~28.5%<\/strong><\/td>\n<\/tr>\n<tr>\n<td>Avg annual dew point (Las Vegas \/ Phoenix)<\/td>\n<td><strong>~20\u00b0F<\/strong><\/td>\n<td>~22 to 25\u00b0F<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Sources: World Population Review 2026; National Weather Service climate normals. Verify current figures before publishing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Relative humidity peaks overnight when temperatures cool and drops to its minimum during afternoon heating. Dew point stays fixed regardless of temperature, measuring actual moisture content in the air. By annual average dew point, Las Vegas posts a lower figure than Phoenix, which is another data point favoring Nevada as the driest state overall.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-top-10-least-humid-states-ranked-for-2026\">Top 10 least humid states, ranked for 2026<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The states with lowest humidity in the U.S. are concentrated almost entirely in the West. All five of the least humid states sit in the arid Southwest or Mountain West, and ranks six through ten include additional Mountain West and Pacific states where geography, not just latitude, drives low moisture levels.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-humidity-by-state-full-rankings\">Humidity by state: full rankings<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The table below covers the ten lowest-humidity states with average dew point for context. For the complete 50-state ranking, the World Population Review data table linked above is the most current public source updated annually.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"ibu-compare\">\n<thead>\n<tr>\n<th>Rank<\/th>\n<th>State<\/th>\n<th>Avg Relative Humidity<\/th>\n<th>Avg Dew Point (\u00b0F)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>1<\/td>\n<td>Nevada<\/td>\n<td>38.3%<\/td>\n<td>~20<\/td>\n<\/tr>\n<tr>\n<td>2<\/td>\n<td>Arizona<\/td>\n<td>38.5%<\/td>\n<td>~22<\/td>\n<\/tr>\n<tr>\n<td>3<\/td>\n<td>New Mexico<\/td>\n<td>45.9%<\/td>\n<td>~28<\/td>\n<\/tr>\n<tr>\n<td>4<\/td>\n<td>Utah<\/td>\n<td>51.7%<\/td>\n<td>~25<\/td>\n<\/tr>\n<tr>\n<td>5<\/td>\n<td>Colorado<\/td>\n<td>54.1%<\/td>\n<td>~27<\/td>\n<\/tr>\n<tr>\n<td>6<\/td>\n<td>Idaho<\/td>\n<td>62.4%<\/td>\n<td>~30<\/td>\n<\/tr>\n<tr>\n<td>7<\/td>\n<td>Wyoming<\/td>\n<td>~60%<\/td>\n<td>~28<\/td>\n<\/tr>\n<tr>\n<td>8<\/td>\n<td>Montana<\/td>\n<td>~62%<\/td>\n<td>~29<\/td>\n<\/tr>\n<tr>\n<td>9<\/td>\n<td>California<\/td>\n<td>~61%<\/td>\n<td>~38<\/td>\n<\/tr>\n<tr>\n<td>10<\/td>\n<td>Oregon<\/td>\n<td>~71%<\/td>\n<td>~40<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Sources: World Population Review 2026 (RH figures); ranks 7 to 10 are approximate pending full 2026 WPR table verification. Dew point values are estimated annual state averages; confirm with NOAA before publishing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The national average annual relative humidity runs approximately 70% to 75% in the humid Southeast. Nevada at 38.3% and Arizona at 38.5% are not just a little drier. They are roughly half as humid as the national mean.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-how-dew-point-compares-to-relative-humidity\">How dew point compares to relative humidity<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Relative humidity and dew point both measure atmospheric moisture, but they behave very differently. Relative humidity rises when temperature drops and falls when temperature rises, even if the actual water content in the air stays constant. This is why the same air mass can measure 80% relative humidity at dawn and 30% by 2 p.m.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dew point does not change with temperature. It is the temperature at which air reaches full saturation and condensation begins. According to <a href=\"https:\/\/www.weather.gov\/ama\/dewpoint\" target=\"_blank\" rel=\"noopener noreferrer\">dew point comfort ranges from the National Weather Service<\/a>, a dew point below 55\u00b0F is generally comfortable; above 65\u00b0F is muggy; above 70\u00b0F is oppressive. Nevada and Arizona stay well below 55\u00b0F for most months, which is why Southwest heat feels more tolerable than humid Southeast conditions at the same air temperature.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Understanding both measures is essential when comparing the least humid states in the US. Average relative humidity tells you where to move. Dew point tells you how it will feel when you get there.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-least-humid-cities-in-the-u-s\">Least humid cities in the U.S.<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">State-level averages smooth over significant variation within each state. A desert valley city and a high-elevation mountain city within the same state can differ by 15 to 20 percentage points in average relative humidity. For relocation decisions, city-level data matters more than statewide figures.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-lowest-afternoon-humidity-by-city\">Lowest afternoon humidity by city<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Afternoon readings capture the driest part of the day in desert cities. Solar heating drives relative humidity to its daily minimum between roughly 1 p.m. and 4 p.m. The cities below record the lowest afternoon relative humidity among major U.S. metros.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"ibu-compare\">\n<thead>\n<tr>\n<th>City<\/th>\n<th>State<\/th>\n<th>Avg Afternoon Humidity<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Las Vegas<\/td>\n<td>NV<\/td>\n<td>~23%<\/td>\n<\/tr>\n<tr>\n<td>Phoenix<\/td>\n<td>AZ<\/td>\n<td>~28%<\/td>\n<\/tr>\n<tr>\n<td>Tucson<\/td>\n<td>AZ<\/td>\n<td>~30%<\/td>\n<\/tr>\n<tr>\n<td>Albuquerque<\/td>\n<td>NM<\/td>\n<td>~32%<\/td>\n<\/tr>\n<tr>\n<td>Reno<\/td>\n<td>NV<\/td>\n<td>~33%<\/td>\n<\/tr>\n<tr>\n<td>El Paso<\/td>\n<td>TX<\/td>\n<td>~34%<\/td>\n<\/tr>\n<tr>\n<td>Denver<\/td>\n<td>CO<\/td>\n<td>~38%<\/td>\n<\/tr>\n<tr>\n<td>Salt Lake City<\/td>\n<td>UT<\/td>\n<td>~38%<\/td>\n<\/tr>\n<tr>\n<td>Boise<\/td>\n<td>ID<\/td>\n<td>~38%<\/td>\n<\/tr>\n<tr>\n<td>Colorado Springs<\/td>\n<td>CO<\/td>\n<td>~40%<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Source: World Population Review 2026 and estimated afternoon averages. Verify against current data before publishing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Las Vegas humidity<\/strong> in the afternoon ranks lowest among major U.S. cities for most of the calendar year. <strong>Phoenix humidity<\/strong> follows closely, dropping below 30% during spring months that represent Arizona&#8217;s driest stretch before monsoon season arrives.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-lowest-morning-humidity-by-city\">Lowest morning humidity by city<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Morning relative humidity runs considerably higher in desert cities than afternoon levels. Overnight cooling reduces air temperature without adding moisture, which pushes relative humidity upward. According to <a href=\"https:\/\/www.currentresults.com\/Weather-Extremes\/US\/low-humidity-cities.php\" target=\"_blank\" rel=\"noopener noreferrer\">morning and afternoon humidity averages for U.S. cities<\/a> from Current Results, Phoenix mornings can reach 55% to 60% relative humidity even during otherwise dry months.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"ibu-compare\">\n<thead>\n<tr>\n<th>City<\/th>\n<th>State<\/th>\n<th>Avg Morning Humidity<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Las Vegas<\/td>\n<td>NV<\/td>\n<td>~43%<\/td>\n<\/tr>\n<tr>\n<td>Phoenix<\/td>\n<td>AZ<\/td>\n<td>~48%<\/td>\n<\/tr>\n<tr>\n<td>Tucson<\/td>\n<td>AZ<\/td>\n<td>~52%<\/td>\n<\/tr>\n<tr>\n<td>Albuquerque<\/td>\n<td>NM<\/td>\n<td>~52%<\/td>\n<\/tr>\n<tr>\n<td>El Paso<\/td>\n<td>TX<\/td>\n<td>~55%<\/td>\n<\/tr>\n<tr>\n<td>Reno<\/td>\n<td>NV<\/td>\n<td>~55%<\/td>\n<\/tr>\n<tr>\n<td>Salt Lake City<\/td>\n<td>UT<\/td>\n<td>~60%<\/td>\n<\/tr>\n<tr>\n<td>Denver<\/td>\n<td>CO<\/td>\n<td>~60%<\/td>\n<\/tr>\n<tr>\n<td>Boise<\/td>\n<td>ID<\/td>\n<td>~62%<\/td>\n<\/tr>\n<tr>\n<td>Colorado Springs<\/td>\n<td>CO<\/td>\n<td>~62%<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Source: Current Results; approximate annual morning averages for major metros. Verify before publishing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The wide gap between morning and afternoon readings is a defining characteristic of desert climate. A visitor arriving in Phoenix at 7 a.m. experiences humidity that feels meaningfully different from what greets them at 2 p.m. on the same day. Annual average figures split the difference and therefore understate the midday dryness these cities produce.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-nevada-vs-arizona-which-is-actually-drier\">Nevada vs. Arizona: which is actually drier?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">AI engines currently answer this question inconsistently. Claude names Arizona as the driest state; ChatGPT and Google&#8217;s AI Overview name Nevada. Neither source explains why both answers are correct depending on the metric. This section resolves the disagreement with data across all three measures.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-average-annual-relative-humidity-compared\">Average annual relative humidity compared<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">On average annual relative humidity, <strong>Nevada (38.3%) is marginally drier than Arizona (38.5%)<\/strong>. The gap is less than a single percentage point, so a methodological difference between data sources can flip the ranking in either direction. Both qualify as the driest states in the US by a wide margin. The next-closest state, New Mexico, sits at 45.9%, more than seven points behind either.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This annual figure is what ChatGPT and Google&#8217;s AI Overview rely on when ranking Nevada first. Annual averages incorporate all hours of the day and all seasons, including Arizona&#8217;s monsoon season from July through September, which temporarily raises Arizona&#8217;s statewide humidity figures above their baseline.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-afternoon-humidity-where-arizona-wins\">Afternoon humidity: where Arizona wins<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Arizona&#8217;s advantage appears in afternoon readings. Phoenix&#8217;s afternoon relative humidity averages approximately <strong>28.5%<\/strong>, lower than Las Vegas during most months outside monsoon season. The Sonoran Desert&#8217;s combination of intense solar radiation and low basin elevation drives afternoon moisture levels below those of the Mojave for most of the calendar year.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">During monsoon season (mid-July through September), moisture flows north from the Gulf of Mexico and Gulf of California. Phoenix and Tucson afternoon dew points can climb above 55\u00b0F and relative humidity can spike past 60% on some days. During this window, Arizona loses its afternoon humidity advantage. This is likely why sources weighting afternoon figures or excluding monsoon months favor Arizona as the driest state.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-why-dew-point-is-the-tiebreaker\">Why dew point is the tiebreaker<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Las Vegas holds an annual average dew point of approximately <strong>20\u00b0F<\/strong>, among the lowest recorded for any major U.S. city. Phoenix&#8217;s annual average dew point sits in the low to mid 20s\u00b0F for most of the year, rising during monsoon months. Both figures reflect an arid climate where actual moisture content is extremely low year-round.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The verdict: <strong>Nevada is driest by average annual relative humidity and by annual average dew point. Arizona is driest by afternoon relative humidity, specifically outside the July through September monsoon window.<\/strong> Both states are dramatically drier than any humid region of the country. The least humid states in the US come down to these two, with New Mexico a clear third at 45.9%.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-best-states-for-year-round-low-humidity\">Best states for year-round low humidity<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Low humidity states are not uniformly livable across all twelve months. Summer heat, monsoon seasons, and elevation all affect whether low relative humidity translates into daily comfort throughout the year.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-southwest-desert-states-dry-but-extreme-heat\">Southwest desert states: dry but extreme heat<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Nevada, Arizona, and New Mexico are the dry states in the US that lead every annual humidity ranking. Their summers, however, test even heat-tolerant residents. Phoenix averages highs above 105\u00b0F in July, with temperatures regularly reaching 110\u00b0F to 115\u00b0F. Las Vegas follows the same pattern.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><a href=\"https:\/\/www.ncei.noaa.gov\/products\/land-based-station\/us-climate-normals\" target=\"_blank\" rel=\"noopener noreferrer\">NOAA climate normals for western U.S. cities<\/a> confirm that Phoenix and Las Vegas rank among the hottest major North American cities by summer maximum temperature. For residents who can limit outdoor midday exposure from June through September, the Southwest climate and mild winters make these cities compelling destinations. Phoenix averages 65\u00b0F highs in January; Las Vegas averages 57\u00b0F highs.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">New Mexico offers a more moderate version of the same arid profile. Albuquerque sits at 5,312 feet elevation, which keeps summer highs in the upper 90s\u00b0F and brings overnight lows below freezing in December and January.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-southern-california-mild-and-low-humidity\">Southern California: mild and low humidity<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">San Diego presents a different trade-off. Its average annual relative humidity runs closer to 65%, higher than the desert Southwest, but its Southwest climate keeps actual dew point values low and temperatures in the 55\u00b0F to 80\u00b0F range year-round. The Mediterranean climate brings dry summers and mild, occasionally rainy winters with no heat extremes.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">San Diego does not qualify among the low humidity states in the same tier as Nevada or Arizona by raw percentage. Its combination of moderate temperatures and consistently low dew points makes it one of the most physically comfortable climates in the country across all four seasons.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-mountain-west-cooler-and-dry-year-round\">Mountain West: cooler and dry year-round<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Colorado and Utah are dry states in the US that offer a genuine four-season climate. Denver records <strong>52.0% average annual relative humidity<\/strong> and more than 300 sunny days per year. Summers reach the mid-90s\u00b0F at peak, but Mountain West dry air makes that heat far more tolerable than coastal or Gulf states at comparable temperatures. Winter lows in Denver can drop to 0\u00b0F to 10\u00b0F, a significant adjustment for residents moving from warmer regions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Prescott, Arizona, at 5,400 feet elevation, blends Mountain West temperatures with Sonoran Desert dryness. Relocation forums consistently cite Prescott as an underrated option for low-humidity living with actual vegetation, moderate summer highs in the low to mid 90s\u00b0F, and winters milder than most Colorado cities.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The table below compares humidity and temperature ranges across the main low-humidity regions.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"ibu-compare\">\n<thead>\n<tr>\n<th>Region or City<\/th>\n<th>Avg Humidity<\/th>\n<th>Summer High (\u00b0F)<\/th>\n<th>Winter Low (\u00b0F)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Las Vegas, NV<\/td>\n<td>~30%<\/td>\n<td>105 to 115<\/td>\n<td>35 to 42<\/td>\n<\/tr>\n<tr>\n<td>Phoenix, AZ<\/td>\n<td>~36.6%<\/td>\n<td>105 to 115<\/td>\n<td>40 to 48<\/td>\n<\/tr>\n<tr>\n<td>Tucson, AZ<\/td>\n<td>~38%<\/td>\n<td>98 to 105<\/td>\n<td>35 to 44<\/td>\n<\/tr>\n<tr>\n<td>Prescott, AZ<\/td>\n<td>~45%<\/td>\n<td>88 to 95<\/td>\n<td>18 to 28<\/td>\n<\/tr>\n<tr>\n<td>Albuquerque, NM<\/td>\n<td>~46%<\/td>\n<td>92 to 98<\/td>\n<td>22 to 30<\/td>\n<\/tr>\n<tr>\n<td>Denver, CO<\/td>\n<td>~52%<\/td>\n<td>88 to 95<\/td>\n<td>0 to 15<\/td>\n<\/tr>\n<tr>\n<td>San Diego, CA<\/td>\n<td>~65%<\/td>\n<td>75 to 85<\/td>\n<td>42 to 52<\/td>\n<\/tr>\n<\/tbody>\n<\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Sources: NOAA climate normals; World Population Review 2026. Temperature ranges are approximate seasonal averages.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-which-states-have-the-worst-humidity\">Which states have the worst humidity?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Understanding the most humid states sharpens the picture of what the states with lowest humidity actually offer by comparison. The gap between the dry West and humid East is wider than most people expect.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-the-southeast-and-gulf-coast\">The Southeast and Gulf Coast<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Florida, Louisiana, Mississippi, and Alabama sit at the far end of the humidity by state spectrum. Florida&#8217;s summer dew points routinely reach 70\u00b0F to 75\u00b0F, producing sticky, suffocating heat that makes sustained outdoor activity uncomfortable. High relative humidity combined with high dew point distinguishes these states from high-altitude states that occasionally post similar raw humidity percentages.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The five most humid states by average annual relative humidity:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Alaska:<\/strong> 77.1% average RH (cold-air moisture, not tropical heat)<\/li>\n\n\n\n<li><strong>Florida:<\/strong> approximately 74% average RH (summer dew points frequently above 70\u00b0F)<\/li>\n\n\n\n<li><strong>Louisiana:<\/strong> approximately 74% average RH (Gulf Coast moisture year-round)<\/li>\n\n\n\n<li><strong>Mississippi:<\/strong> approximately 73% average RH (oppressive summer dew points)<\/li>\n\n\n\n<li><strong>Hawaii:<\/strong> approximately 73% average RH (trade wind moisture, moderate temperatures)<\/li>\n<\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Sources: World Population Review and worldatlas.com data cited in AI engine outputs. Verify current rankings before publishing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A dew point above 65\u00b0F is uncomfortable by National Weather Service standards; above 70\u00b0F is oppressive. Florida&#8217;s Gulf Coast cities regularly exceed the oppressive threshold for three to five months per year. The humidity by state comparison makes this gap concrete: Nevada at 38.3% versus Florida at approximately 74%.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-alaska-high-rh-different-story\">Alaska: high RH, different story<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Alaska holds the <strong>highest average relative humidity in the nation at 77.1%<\/strong>, but the experience of that humidity is entirely different from Florida&#8217;s. Alaska&#8217;s high relative humidity results from cold, moisture-saturated air rather than tropical heat. A 77% reading at 45\u00b0F feels cool and fresh. Dew points in Alaska rarely reach 55\u00b0F even in summer, keeping it well below the discomfort threshold despite the high raw percentage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">This distinction matters whenever you compare states with lowest humidity to states with highest humidity by relative humidity percentage alone. Raw percentage without dew point context can mislead when Alaska sits at the top of the list.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-the-100th-meridian-as-a-dividing-line\">The 100th meridian as a dividing line<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Climatologists use the <strong>100th meridian<\/strong> (running roughly from Laredo, Texas north through Wichita, Kansas) as the traditional dividing line between the humid eastern United States and the arid western half. West of this line, average annual precipitation drops sharply, vegetation shifts from tallgrass to shortgrass, and the dry states in the US that dominate low-humidity rankings become the geographic norm.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">East of the 100th meridian, moisture from the Gulf of Mexico flows northward through the central and eastern states for much of the year. This geographic divide explains why the states with lowest humidity are almost exclusively western states and why the most uncomfortable humidity concentrates along the Gulf Coast and Southeast.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-is-low-humidity-bad-for-your-health\">Is low humidity bad for your health?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Low humidity carries real physiological trade-offs alongside its comfort benefits. The effects range from minor irritations to measurable impacts on infection risk.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-effects-on-sinuses-and-nasal-passages\">Effects on sinuses and nasal passages<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Low humidity is harmful to sinus health. Dry air dehydrates nasal mucous membranes, reducing their ability to filter pathogens and increasing susceptibility to sinus infections, according to <a href=\"https:\/\/www.mayoclinic.org\/diseases-conditions\/common-cold\/in-depth\/humidifiers\/art-20048021\" target=\"_blank\" rel=\"noopener noreferrer\">Mayo Clinic guidance on dry air and sinus health<\/a>. When indoor humidity drops below 30%, nasal tissue dries out, causing nosebleeds, cracked lips, and a compromised first line of defense against airborne particles.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Residents of Nevada, Arizona, and New Mexico frequently notice these effects after moving from humid climates, particularly during winter heating season when forced-air heat further depletes indoor humidity. A whole-house or portable humidifier targeting 30% to 50% indoor relative humidity is the standard clinical recommendation for dry-climate residents.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-respiratory-health-and-mucociliary-function\">Respiratory health and mucociliary function<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The biological mechanism behind dry-air respiratory symptoms is well documented. Research published as PMC6561219 (Kudo et al.) found that low ambient humidity impairs <strong>mucociliary clearance<\/strong>, the cilia-driven process that moves pathogens and particles out of the respiratory tract, as well as innate antiviral defense and tissue repair. This study is available through <a href=\"https:\/\/pubmed.ncbi.nlm.nih.gov\/30688852\/\" target=\"_blank\" rel=\"noopener noreferrer\">published research on mucociliary clearance and humidity<\/a> at PubMed.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When humidity drops below 30%, mucus thickens and cilia cannot clear it effectively. Viruses and bacteria can then establish more easily in nasal and bronchial passages. The driest states, Nevada and Arizona, regularly see outdoor relative humidity drop to 15% to 25% in late spring. Unhumidified indoor levels can approach or fall below the 30% risk threshold during these periods.<\/p>\n\n\n\n<aside class=\"ibu-callout ibu-callout-tip\">\n  <strong>Tip:<\/strong> <p>If you wake up in a dry-climate home with a sore throat or nosebleed, check your indoor humidity before assuming you are getting sick. A digital hygrometer costs $15 to $30 and will show whether overnight indoor humidity has dropped below 30%. Most dry-air symptoms clear once indoor humidity is restored to 35% to 50%.<\/p>\n<\/aside>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-skin-and-eye-dryness\">Skin and eye dryness<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Low humidity accelerates transepidermal water loss, the process by which skin loses moisture through its surface. At humidity levels below 30%, this causes dryness, irritation, and cracking on exposed areas including the face, hands, and lips. People relocating from the Southeast or Gulf Coast to Nevada or Arizona commonly report a skin adjustment period of 3 to 6 months.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Dry air also affects eye comfort. Tear film evaporates faster in low-humidity environments, which can worsen existing dry-eye conditions. Contact lens wearers in particular notice increased discomfort in dry states compared to the humid East.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-how-to-manage-low-humidity-at-home\">How to manage low humidity at home<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Living in one of the least humid states in the US does not mean accepting dry-air discomfort. The right combination of equipment and habits keeps indoor humidity in the healthy range year-round.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-choosing-a-humidifier-for-dry-climates\">Choosing a humidifier for dry climates<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Two types of humidifiers serve dry-climate homes. Portable units cover approximately 300 to 500 square feet and work well for a single bedroom or living area. Whole-house humidifiers connect to your HVAC system and distribute moisture evenly through all conditioned spaces; they require professional installation but eliminate daily tank refilling.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">In Las Vegas or Phoenix, supplemental humidification is typically needed from October through May, when outdoor relative humidity regularly drops to 15% to 25%. A properly sized whole-house unit calibrated for this window generally maintains indoor humidity in the 35% to 45% range without constant adjustment.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-monitoring-indoor-humidity\">Monitoring indoor humidity<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A digital hygrometer (indoor humidity monitor) costs $10 to $30 at most hardware stores. Without one, you are estimating. Place one in the bedroom and one in the main living area. Overnight indoor relative humidity in Phoenix or Las Vegas homes without humidification often drops to 10% to 20% during the heating season.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">According to <a href=\"https:\/\/www.epa.gov\/indoor-air-quality-iaq\/inside-story-guide-indoor-air-quality\" target=\"_blank\" rel=\"noopener noreferrer\">EPA guidelines for healthy indoor humidity levels<\/a>, maintaining indoor relative humidity between <strong>30% and 50%<\/strong> minimizes mold growth, dust mite activity, and respiratory irritation. Below 30% creates the dry-air health risks described above. Above 60% creates mold growth and structural moisture problems.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-other-humidity-raising-strategies\">Other humidity-raising strategies<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Several low-cost approaches complement humidifier use. Houseplants release moisture through transpiration; a grouping of 5 to 10 plants in a room can raise relative humidity by 3 to 5 percentage points, a modest but measurable improvement. Leaving bathroom doors open after showering lets steam move into adjacent rooms. Simmering water on the stove during dry winter evenings adds moisture directly to the indoor air.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Air sealing your home reduces the rate at which dry outdoor air infiltrates and displaces moisture you have added. In dry climates, energy efficiency and indoor humidity management point in the same direction. A tighter home holds both heat and moisture more effectively.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">If your research points to Nevada, Arizona, or New Mexico as your next home, the practical next step is selling your current one on your timeline. iBuyer.com connects you with multiple vetted cash buyers competing for your property, with no listing, no agent commission, and a close date you choose, typically within 7 to 30 days. Compare offers side by side and move when the relocation timing works for you, not when the market decides. Get competing cash offers on your home<\/p>\n\n\n<div class=\"card my-5 shadow-lg\">\n  <div class=\"card-body py-md-4\">\n    <div class=\"row align-items-center justify-content-center py-md-3 py-lg-2 py-xl-3\">\n      <div class=\"col-12\">\n        <p class=\"mb-4 h3 text-center\">\n          <span class=\"h4 text-primary font-weight-bold\">Compare Cash Offers from <span class=\"d-inline-block\">Top Home Buyers.<\/span><\/span>\n          <span class=\"mt-2 d-block font-weight-normal text-muted\">Delivered by Your Local iBuyer <span class=\"d-inline-block\">Certified Specialist.<\/span><\/span>\n        <\/p>\n      <\/div>\n\n      <div class=\"col-12\">\n        <div class=\"ui-v2 search-address-form bg-white py-0\">\n          <div class=\"row justify-content-md-center\">\n            <div class=\"col-12 col-md-7 pr-md-2\">\n              <div class=\"input-group mb-0 shadow-sm\">\n                <div class=\"input-group-prepend\">\n                  <div class=\"input-group-text bg-white border-right-0\">\n                    <div class=\"icon\">\n                      <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"16\" height=\"16\" fill=\"currentColor\" class=\"bi bi-geo-alt-fill\" viewBox=\"0 0 16 16\">\n                        <path d=\"M8 16s6-5.686 6-10A6 6 0 0 0 2 6c0 4.314 6 10 6 10zm0-7a3 3 0 1 1 0-6 3 3 0 0 1 0 6z\"><\/path>\n                      <\/svg>\n                    <\/div>\n                  <\/div>\n                <\/div>\n\n                <input type=\"text\" id=\"autocomplete4\" class=\"form-control form-control-lg px-0\" placeholder=\"Enter your home address\" autocomplete=\"off\" v-on:change=\"onAddressChange($event)\" v-on:keydown.enter=\"searchMyAddress($event)\" onfocus=\"this.autocomplete='smartystreets'\">\n\n                <div class=\"input-group-append\">\n                  <div class=\"input-group-text bg-white border-left-0 p-0\">\n                    <button type=\"reset\" id=\"clear-address-btn4\" class=\"btn px-2 h-100\" name=\"clear\">\n                      <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"16\" height=\"16\" fill=\"currentColor\" class=\"bi bi-x\" viewBox=\"0 0 16 16\">\n                        <path d=\"M4.646 4.646a.5.5 0 0 1 .708 0L8 7.293l2.646-2.647a.5.5 0 0 1 .708.708L8.707 8l2.647 2.646a.5.5 0 0 1-.708.708L8 8.707l-2.646 2.647a.5.5 0 0 1-.708-.708L7.293 8 4.646 5.354a.5.5 0 0 1 0-.708z\"><\/path>\n                      <\/svg>\n                    <\/button>\n                  <\/div>\n                <\/div>\n              <\/div>\n\n              <ul class=\"us-autocomplete-pro-menu4 autocomplete-menu\" style=\"display:none;\"><\/ul>\n            <\/div>\n\n            <div class=\"col-12 col-md-auto pl-md-2\">\n              <button type=\"button\" id=\"disabledHomeValue4\" class=\"btn btn-primary btn-lg btn-block mt-3 mt-md-0\" v-on:click=\"searchMyAddress($event)\" disabled=\"\">\n                Get My Home Value\n              <\/button>\n            <\/div>\n          <\/div>\n        <\/div>\n\n        <p class=\"h5 mt-4 mb-0 text-center font-weight-bold text-info\">\n          One Expert, Multiple Offers, <span class=\"d-inline-block\">No Obligation.<\/span>\n        <\/p>\n      <\/div>\n    <\/div>\n  <\/div>\n<\/div>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-frequently-asked-questions\">Frequently Asked Questions<\/h2>\n\n\n\n<div class=\"schema-faq tend-faq\"><div class=\"schema-faq-section\" id=\"faq-question-1779439147445\"><strong class=\"schema-faq-question\">What is the least humid state in the USA?<\/strong> <p class=\"schema-faq-answer\">Nevada is the least humid state in the U.S. by average annual relative humidity, at approximately 38.3%, according to World Population Review 2026 data. Arizona ranks second at 38.5% annual average but records a lower afternoon humidity of 28.5% on most days. New Mexico ranks third at 45.9%. The answer varies by metric, as the Nevada vs. Arizona section of this guide explains in detail.<\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1779439147446\"><strong class=\"schema-faq-question\">What are the top 5 least humid states in the U.S.?<\/strong> <p class=\"schema-faq-answer\">The five least humid U.S. states are Nevada (38.3%), Arizona (38.5%), New Mexico (45.9%), Utah (51.7%), and Colorado (54.1%), ranked by average annual relative humidity. All five are located in the arid Southwest or Mountain West. Each is significantly drier than the national average of roughly 70% to 75% in the humid Southeast.<\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1779439147447\"><strong class=\"schema-faq-question\">Is Nevada or Arizona the least humid state?<\/strong> <p class=\"schema-faq-answer\">Nevada ranks lowest on average annual relative humidity (38.3%); Arizona ranks lowest on afternoon relative humidity (28.5%). Both answers are correct depending on which metric you use. Annual averages include higher morning readings in both desert states. Dew point shows Las Vegas posting a lower annual average than Phoenix, giving Nevada the edge by that measure as well.<\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1779439147448\"><strong class=\"schema-faq-question\">What is the least humid city in the United States?<\/strong> <p class=\"schema-faq-answer\">Las Vegas, Nevada records the lowest average relative humidity of any major U.S. city, at approximately 30.3% annual average, with afternoon readings frequently below 25%. Phoenix, Arizona ranks second at 36.6% annual average. Tucson and Albuquerque also rank among the driest cities nationally. Morning humidity in all three cities is considerably higher than their afternoon figures.<\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1779439147449\"><strong class=\"schema-faq-question\">Where is the best year-round weather in the US with low humidity?<\/strong> <p class=\"schema-faq-answer\">For year-round low humidity with moderate temperatures, San Diego, California and Prescott, Arizona offer the best combination of mild winters and dry summers. Phoenix and Las Vegas have lower humidity overall but regularly exceed 110\u00b0F in summer. Denver offers low humidity and more than 300 sunny days per year but drops to sub-freezing winters. San Diego&#8217;s Mediterranean climate keeps temperatures in the 55\u00b0F to 80\u00b0F range year-round.<\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1779439147450\"><strong class=\"schema-faq-question\">What US states have the worst humidity?<\/strong> <p class=\"schema-faq-answer\">Alaska has the highest average relative humidity in the nation at 77.1%, followed by Florida and Louisiana among the most uncomfortable states due to high dew points. Alaska&#8217;s high humidity results from cold air rather than tropical moisture and does not feel muggy. Florida, Louisiana, and Mississippi combine high relative humidity with summer dew points frequently reaching 70\u00b0F to 75\u00b0F, producing the sticky heat most people associate with humid climates.<\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1779439147451\"><strong class=\"schema-faq-question\">Is low humidity bad for sinuses?<\/strong> <p class=\"schema-faq-answer\">Low humidity is harmful to sinus health, drying out nasal mucous membranes and increasing susceptibility to infections, per the Mayo Clinic. When indoor humidity drops below 30%, mucus thickens and cilia cannot clear it effectively, allowing viruses and bacteria to establish more easily. Published research (PMC6561219) confirms that low ambient humidity impairs mucociliary clearance and innate antiviral defense. Maintaining indoor humidity between 30% and 50% reduces these risks.<\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1779439147452\"><strong class=\"schema-faq-question\">What humidity level is considered uncomfortable?<\/strong> <p class=\"schema-faq-answer\">A dew point above 65\u00b0F is generally considered uncomfortable; above 70\u00b0F is oppressive, per National Weather Service guidelines. Relative humidity alone does not measure discomfort accurately. A 90% reading at 40\u00b0F feels cool and fresh, while 50% relative humidity at 95\u00b0F with a 70\u00b0F dew point feels suffocating. Dew point is the more reliable comfort metric, which is why Nevada and Arizona feel more tolerable than Florida at similar air temperatures.<\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1779439147453\"><strong class=\"schema-faq-question\">What is the difference between relative humidity and dew point?<\/strong> <p class=\"schema-faq-answer\">Relative humidity measures moisture as a percentage of what air can hold at a given temperature; dew point is the temperature at which air must cool to reach 100% saturation. Dew point does not shift as air temperature rises and falls, making it a stable measure of actual moisture content and more useful for comparing comfort across climates. Meteorologists generally prefer dew point for heat-humidity comfort assessments.<\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1779439147454\"><strong class=\"schema-faq-question\">What states have low humidity and warm winters?<\/strong> <p class=\"schema-faq-answer\">Arizona and Nevada offer the best combination of low humidity and warm winters, with Phoenix averaging 65\u00b0F highs in January and Las Vegas averaging 57\u00b0F highs. New Mexico and southern California also offer warm winters with low humidity, though Albuquerque at 5,312 feet sees sub-freezing overnight temperatures in December and January. Southern California&#8217;s coastal areas maintain the mildest year-round temperature range of any region in the country.<\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1779439147455\"><strong class=\"schema-faq-question\">Is low humidity bad for your skin?<\/strong> <p class=\"schema-faq-answer\">Low humidity accelerates skin moisture loss through transepidermal water loss, causing dryness, irritation, and cracking at humidity levels below 30%. People relocating from humid climates to Nevada or Arizona frequently report a skin adjustment period of 3 to 6 months. Daily moisturizer application and increased water intake are standard recommendations for dry-climate residents.<\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1779439147456\"><strong class=\"schema-faq-question\">What indoor humidity level is recommended?<\/strong> <p class=\"schema-faq-answer\">The EPA recommends maintaining indoor relative humidity between 30% and 50% to minimize mold growth, dust mite activity, and respiratory irritation. In the driest states, indoor relative humidity during winter heating season can drop to 10% to 20% without supplemental humidification. Both too-low (below 30%) and too-high (above 60%) indoor humidity create health and building-maintenance problems.<\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1779439147457\"><strong class=\"schema-faq-question\">Does low humidity make wildfires more likely?<\/strong> <p class=\"schema-faq-answer\">Low relative humidity dries vegetation rapidly, prompting the National Weather Service to issue Red Flag Warnings when it drops below 15% combined with high winds and dry fuel. Nevada, Arizona, New Mexico, and Colorado all experience fire weather conditions in autumn and early spring. The driest months in the Southwest, May and June before monsoon season, carry the highest wildfire risk.<\/p><\/div><div class=\"schema-faq-section\" id=\"faq-question-1779439147458\"><strong class=\"schema-faq-question\">Does the Southwest have a humid season?<\/strong> <p class=\"schema-faq-answer\">The Southwest monsoon season runs from mid-June through September, temporarily raising humidity in Arizona and New Mexico to levels that feel uncomfortable compared to the rest of the year. During monsoon season, Tucson and Phoenix can see afternoon dew points climb above 55\u00b0F and relative humidity spike above 60%. Las Vegas is less affected by the monsoon but still sees occasional humid days during this period.<\/p><\/div><script type=\"application\/ld+json\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What is the least humid state in the USA?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Nevada is the least humid state in the U.S. by average annual relative humidity, at approximately 38.3%, according to World Population Review 2026 data. Arizona ranks second at 38.5% annual average but records a lower afternoon humidity of 28.5% on most days. New Mexico ranks third at 45.9%. The answer varies by metric, as the Nevada vs. Arizona section of this guide explains in detail.\"}},{\"@type\":\"Question\",\"name\":\"What are the top 5 least humid states in the U.S.?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The five least humid U.S. states are Nevada (38.3%), Arizona (38.5%), New Mexico (45.9%), Utah (51.7%), and Colorado (54.1%), ranked by average annual relative humidity. All five are located in the arid Southwest or Mountain West. Each is significantly drier than the national average of roughly 70% to 75% in the humid Southeast.\"}},{\"@type\":\"Question\",\"name\":\"Is Nevada or Arizona the least humid state?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Nevada ranks lowest on average annual relative humidity (38.3%); Arizona ranks lowest on afternoon relative humidity (28.5%). Both answers are correct depending on which metric you use. Annual averages include higher morning readings in both desert states. Dew point shows Las Vegas posting a lower annual average than Phoenix, giving Nevada the edge by that measure as well.\"}},{\"@type\":\"Question\",\"name\":\"What is the least humid city in the United States?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Las Vegas, Nevada records the lowest average relative humidity of any major U.S. city, at approximately 30.3% annual average, with afternoon readings frequently below 25%. Phoenix, Arizona ranks second at 36.6% annual average. Tucson and Albuquerque also rank among the driest cities nationally. Morning humidity in all three cities is considerably higher than their afternoon figures.\"}},{\"@type\":\"Question\",\"name\":\"Where is the best year-round weather in the US with low humidity?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"For year-round low humidity with moderate temperatures, San Diego, California and Prescott, Arizona offer the best combination of mild winters and dry summers. Phoenix and Las Vegas have lower humidity overall but regularly exceed 110\u00b0F in summer. Denver offers low humidity and more than 300 sunny days per year but drops to sub-freezing winters. San Diego's Mediterranean climate keeps temperatures in the 55\u00b0F to 80\u00b0F range year-round.\"}},{\"@type\":\"Question\",\"name\":\"What US states have the worst humidity?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Alaska has the highest average relative humidity in the nation at 77.1%, followed by Florida and Louisiana among the most uncomfortable states due to high dew points. Alaska's high humidity results from cold air rather than tropical moisture and does not feel muggy. Florida, Louisiana, and Mississippi combine high relative humidity with summer dew points frequently reaching 70\u00b0F to 75\u00b0F, producing the sticky heat most people associate with humid climates.\"}},{\"@type\":\"Question\",\"name\":\"Is low humidity bad for sinuses?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Low humidity is harmful to sinus health, drying out nasal mucous membranes and increasing susceptibility to infections, per the Mayo Clinic. When indoor humidity drops below 30%, mucus thickens and cilia cannot clear it effectively, allowing viruses and bacteria to establish more easily. Published research (PMC6561219) confirms that low ambient humidity impairs mucociliary clearance and innate antiviral defense. Maintaining indoor humidity between 30% and 50% reduces these risks.\"}},{\"@type\":\"Question\",\"name\":\"What humidity level is considered uncomfortable?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"A dew point above 65\u00b0F is generally considered uncomfortable; above 70\u00b0F is oppressive, per National Weather Service guidelines. Relative humidity alone does not measure discomfort accurately. A 90% reading at 40\u00b0F feels cool and fresh, while 50% relative humidity at 95\u00b0F with a 70\u00b0F dew point feels suffocating. Dew point is the more reliable comfort metric, which is why Nevada and Arizona feel more tolerable than Florida at similar air temperatures.\"}},{\"@type\":\"Question\",\"name\":\"What is the difference between relative humidity and dew point?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Relative humidity measures moisture as a percentage of what air can hold at a given temperature; dew point is the temperature at which air must cool to reach 100% saturation. Dew point does not shift as air temperature rises and falls, making it a stable measure of actual moisture content and more useful for comparing comfort across climates. Meteorologists generally prefer dew point for heat-humidity comfort assessments.\"}},{\"@type\":\"Question\",\"name\":\"What states have low humidity and warm winters?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Arizona and Nevada offer the best combination of low humidity and warm winters, with Phoenix averaging 65\u00b0F highs in January and Las Vegas averaging 57\u00b0F highs. New Mexico and southern California also offer warm winters with low humidity, though Albuquerque at 5,312 feet sees sub-freezing overnight temperatures in December and January. Southern California's coastal areas maintain the mildest year-round temperature range of any region in the country.\"}},{\"@type\":\"Question\",\"name\":\"Is low humidity bad for your skin?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Low humidity accelerates skin moisture loss through transepidermal water loss, causing dryness, irritation, and cracking at humidity levels below 30%. People relocating from humid climates to Nevada or Arizona frequently report a skin adjustment period of 3 to 6 months. Daily moisturizer application and increased water intake are standard recommendations for dry-climate residents.\"}},{\"@type\":\"Question\",\"name\":\"What indoor humidity level is recommended?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The EPA recommends maintaining indoor relative humidity between 30% and 50% to minimize mold growth, dust mite activity, and respiratory irritation. In the driest states, indoor relative humidity during winter heating season can drop to 10% to 20% without supplemental humidification. Both too-low (below 30%) and too-high (above 60%) indoor humidity create health and building-maintenance problems.\"}},{\"@type\":\"Question\",\"name\":\"Does low humidity make wildfires more likely?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Low relative humidity dries vegetation rapidly, prompting the National Weather Service to issue Red Flag Warnings when it drops below 15% combined with high winds and dry fuel. Nevada, Arizona, New Mexico, and Colorado all experience fire weather conditions in autumn and early spring. The driest months in the Southwest, May and June before monsoon season, carry the highest wildfire risk.\"}},{\"@type\":\"Question\",\"name\":\"Does the Southwest have a humid season?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The Southwest monsoon season runs from mid-June through September, temporarily raising humidity in Arizona and New Mexico to levels that feel uncomfortable compared to the rest of the year. During monsoon season, Tucson and Phoenix can see afternoon dew points climb above 55\u00b0F and relative humidity spike above 60%. Las Vegas is less affected by the monsoon but still sees occasional humid days during this period.\"}}]}<\/script><\/div>\n","protected":false},"excerpt":{"rendered":"<p>The least humid states in the US cluster in the arid Southwest and Mountain West, with Nevada leading at 38.3% average annual relative humidity, followed by Arizona at 38.5% and New Mexico at 45.9%, according to state humidity rankings from World Population Review. Utah (51.7%) and Colorado (54.1%) round out the top five among low [&hellip;]<\/p>\n","protected":false},"author":37,"featured_media":15888,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[208],"tags":[],"class_list":["post-15840","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-home-value"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v27.9 (Yoast SEO v27.9) - https:\/\/yoast.com\/product\/yoast-seo-premium-wordpress\/ -->\n<title>Least Humid States in the U.S. (2026)<\/title>\n<meta name=\"description\" content=\"Discover the driest states in the U.S. with low humidity, clean air, and better comfort. 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