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Climate and Average Weather Year Round in Ault Colorado, United States

In Ault, the summers are warm and mostly clear and the winters are freezing, dry, windy, and partly cloudy. Over the course of the year, the temperature typically varies from 16°F to 87°F and is rarely below 0°F or above 96°F.

Based on the tourism score, the best time of year to visit Ault for warm-weather activities is from mid June to late August.

Climate in Ault

very coldcoldcoolwarmhotwarmcoolcoldvery coldJanFebMarAprMayJunJulAugSepOctNovDecNowNow75%75%52%52%clearovercastprecipitation: 2.0 inprecipitation: 2.0 in0.3 in0.3 inmuggy: 0%muggy: 0%0%0%drydrytourism score: 6.8tourism score: 6.80.10.1
Ault weather by month. Click on each chart for more information.

Average Temperature in Ault

The hot season lasts for 3.3 months, from June 5 to September 15, with an average daily high temperature above 77°F. The hottest day of the year is July 13, with an average high of 87°F and low of 59°F.

The cold season lasts for 3.1 months, from November 21 to February 26, with an average daily high temperature below 48°F. The coldest day of the year is December 30, with an average low of 16°F and high of 38°F.

Average High and Low Temperature in Ault

Average High and Low Temperature in AulthotcoldcoldJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°F90°F90°F100°F100°FDec 3038°FDec 3038°FJul 1387°FJul 1387°F16°F16°F59°F59°FJun 577°FJun 577°FSep 1577°FSep 1577°FFeb 2648°FFeb 2648°F51°F51°F49°F49°F25°F25°F23°F23°FNowNow
The daily average high (red line) and low (blue line) temperature, with 25th to 75th and 10th to 90th percentile bands. The thin dotted lines are the corresponding average perceived temperatures.

The figure below shows you a compact characterization of the entire year of hourly average temperatures. The horizontal axis is the day of the year, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day.

Average Hourly Temperature in Ault

Average Hourly Temperature in AultJanFebMarAprMayJunJulAugSepOctNovDec12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMNowNowfreezingfreezingfreezingfreezingvery coldvery coldcoldcoldcoolcomfortablewarmcomfortable
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The average hourly temperature, color coded into bands. The shaded overlays indicate night and civil twilight.

Göreme, Turkey (6,405 miles away) and Bījār, Iran (6,878 miles) are the far-away foreign places with temperatures most similar to Ault (view comparison).

Compare Ault to another city:

Clouds

In Ault, the average percentage of the sky covered by clouds experiences significant seasonal variation over the course of the year.

The clearer part of the year in Ault begins around June 3 and lasts for 4.7 months, ending around October 27. On July 2, the clearest day of the year, the sky is clear, mostly clear, or partly cloudy 75% of the time, and overcast or mostly cloudy 25% of the time.

The cloudier part of the year begins around October 27 and lasts for 7.2 months, ending around June 3. On March 4, the cloudiest day of the year, the sky is overcast or mostly cloudy 48% of the time, and clear, mostly clear, or partly cloudy 52% of the time.

Cloud Cover Categories in Ault

Cloud Cover Categories in AultclearercloudiercloudierJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%Jul 275%Jul 275%Mar 452%Mar 452%Jun 363%Jun 363%Oct 2763%Oct 2763%NowNowclearmostly clearpartly cloudymostly cloudyovercast
0% clear 20% mostly clear 40% partly cloudy 60% mostly cloudy 80% overcast 100%
The percentage of time spent in each cloud cover band, categorized by the percentage of the sky covered by clouds.

Precipitation

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. The chance of wet days in Ault varies throughout the year.

The wetter season lasts 4.5 months, from April 6 to August 23, with a greater than 17% chance of a given day being a wet day. The chance of a wet day peaks at 28% on May 25.

The drier season lasts 7.5 months, from August 23 to April 6. The smallest chance of a wet day is 6% on January 12.

Among wet days, we distinguish between those that experience rain alone, snow alone, or a mixture of the two. Based on this categorization, the most common form of precipitation in Ault changes throughout the year.

Rain alone is the most common for 9.0 months, from February 18 to November 20. The highest chance of a day with rain alone is 28% on May 26.

Snow alone is the most common for 3.0 months, from November 20 to February 18. The highest chance of a day with snow alone is 5% on December 7.

Daily Chance of Precipitation in Ault

Daily Chance of Precipitation in AultsnowrainsnowJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%May 2528%May 2528%Jan 126%Jan 126%Feb 188%Feb 188%Nov 209%Nov 209%Jan 16%Jan 16%Apr 617%Apr 617%Aug 2317%Aug 2317%NowNowrainmixed
The percentage of days in which various types of precipitation are observed, excluding trace quantities: rain alone, snow alone, and mixed (both rain and snow fell in the same day).

Rainfall

To show variation within the months and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day of the year. Ault experiences some seasonal variation in monthly rainfall.

The rainy period of the year lasts for 7.3 months, from March 20 to October 29, with a sliding 31-day rainfall of at least 0.5 inches. The most rain falls during the 31 days centered around May 19, with an average total accumulation of 1.9 inches.

The rainless period of the year lasts for 4.7 months, from October 29 to March 20. The least rain falls around December 19, with an average total accumulation of 0.1 inches.

Average Monthly Rainfall in Ault

The average rainfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average liquid-equivalent snowfall.

Snowfall

The sliding 31-day liquid-equivalent quantity of snowfall in Ault does not vary significantly over the course of the year, staying within 0.1 inches of 0.1 inches throughout.

Average Liquid-Equivalent Monthly Snowfall in Ault

Average Liquid-Equivalent Monthly Snowfall in AultsnowsnowJanFebMarAprMayJunJulAugSepOctNovDec0.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 inMar 190.2 inMar 190.2 inJul 150.0 inJul 150.0 inDec 80.2 inDec 80.2 inJan 90.2 inJan 90.2 inOct 130.1 inOct 130.1 inApr 240.1 inApr 240.1 in
The average liquid-equivalent snowfall (solid line) accumulated over the course of a sliding 31-day period centered on the day in question, with 25th to 75th and 10th to 90th percentile bands. The thin dotted line is the corresponding average rainfall.

Sun

The length of the day in Ault varies significantly over the course of the year. In 2021, the shortest day is December 21, with 9 hours, 16 minutes of daylight; the longest day is June 20, with 15 hours, 5 minutes of daylight.

Hours of Daylight and Twilight in Ault

Hours of Daylight and Twilight in AultJanFebMarAprMayJunJulAugSepOctNovDec0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hr12 hr, 7 minMar 2012 hr, 7 minMar 2015 hr, 5 minJun 2015 hr, 5 minJun 2012 hr, 9 minSep 2212 hr, 9 minSep 229 hr, 16 minDec 219 hr, 16 minDec 21nightnightdayNowNow
The number of hours during which the Sun is visible (black line). From bottom (most yellow) to top (most gray), the color bands indicate: full daylight, twilight (civil, nautical, and astronomical), and full night.

The earliest sunrise is at 5:27 AM on June 14, and the latest sunrise is 2 hours, 8 minutes later at 7:35 AM on November 6. The earliest sunset is at 4:31 PM on December 7, and the latest sunset is 4 hours, 2 minutes later at 8:33 PM on June 27.

Daylight saving time (DST) is observed in Ault during 2021, starting in the spring on March 14, lasting 7.8 months, and ending in the fall on November 7.

Sunrise & Sunset with Twilight and Daylight Saving Time in Ault

Sunrise & Sunset with Twilight and Daylight Saving Time in AultJanFebMarAprMayJunJulAugSepOctNovDec12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMJun 145:27 AMJun 145:27 AM8:33 PMJun 278:33 PMJun 27Dec 74:31 PMDec 74:31 PM7:35 AMNov 67:35 AMNov 6Mar 14DSTMar 14DSTDSTNov 7DSTNov 7daynightnightnightnightSolarMidnightSolarMidnightSolarNoonSunriseSunsetNowNow
The solar day over the course of the year 2021. From bottom to top, the black lines are the previous solar midnight, sunrise, solar noon, sunset, and the next solar midnight. The day, twilights (civil, nautical, and astronomical), and night are indicated by the color bands from yellow to gray. The transitions to and from daylight saving time are indicated by the 'DST' labels.

Moon

The figure below presents a compact representation of key lunar data for 2021. The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon. The vertical gray bars (new Moons) and blue bars (full Moons) indicate key Moon phases.

Moon Rise, Set & Phases in Ault

The time in which the moon is above the horizon (light blue area), with new moons (dark gray lines) and full moons (blue lines) indicated. The shaded overlays indicate night and civil twilight.

Humidity

We base the humidity comfort level on the dew point, as it determines whether perspiration will evaporate from the skin, thereby cooling the body. Lower dew points feel drier and higher dew points feel more humid. Unlike temperature, which typically varies significantly between night and day, dew point tends to change more slowly, so while the temperature may drop at night, a muggy day is typically followed by a muggy night.

The perceived humidity level in Ault, as measured by the percentage of time in which the humidity comfort level is muggy, oppressive, or miserable, does not vary significantly over the course of the year, remaining a virtually constant 0% throughout.

Humidity Comfort Levels in Ault

Humidity Comfort Levels in AultJanFebMarAprMayJunJulAugSepOctNovDec0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%Jan 310%Jan 310%Aug 20%Aug 20%NowNowdrydry
dry 55°F comfortable 60°F humid 65°F muggy 70°F oppressive 75°F miserable
The percentage of time spent at various humidity comfort levels, categorized by dew point.

Wind

This section discusses the wide-area hourly average wind vector (speed and direction) at 10 meters above the ground. The wind experienced at any given location is highly dependent on local topography and other factors, and instantaneous wind speed and direction vary more widely than hourly averages.

The average hourly wind speed in Ault experiences significant seasonal variation over the course of the year.

The windier part of the year lasts for 5.9 months, from November 11 to May 8, with average wind speeds of more than 8.7 miles per hour. The windiest day of the year is January 18, with an average hourly wind speed of 10.6 miles per hour.

The calmer time of year lasts for 6.1 months, from May 8 to November 11. The calmest day of the year is August 19, with an average hourly wind speed of 6.8 miles per hour.

Average Wind Speed in Ault

Average Wind Speed in AultwindywindyJanFebMarAprMayJunJulAugSepOctNovDec0 mph0 mph2 mph2 mph4 mph4 mph6 mph6 mph8 mph8 mph10 mph10 mph12 mph12 mph14 mph14 mph16 mph16 mph18 mph18 mphJan 1810.6 mphJan 1810.6 mphAug 196.8 mphAug 196.8 mphNov 118.7 mphNov 118.7 mphMay 88.7 mphMay 88.7 mphNowNow
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The predominant average hourly wind direction in Ault varies throughout the year.

The wind is most often from the north for 3.3 weeks, from April 25 to May 18, with a peak percentage of 32% on April 29. The wind is most often from the west for 1.4 months, from May 18 to June 29 and for 8.4 months, from August 13 to April 25, with a peak percentage of 28% on May 18. The wind is most often from the east for 1.5 months, from June 29 to August 13, with a peak percentage of 30% on July 30.

Wind Direction in Ault

Wind Direction in AultWNWEWJanFebMarAprMayJunJulAugSepOctNovDec0%100%20%80%40%60%60%40%80%20%100%0%NowNowwestsoutheastnorth
northeastsouthwest
The percentage of hours in which the mean wind direction is from each of the four cardinal wind directions, excluding hours in which the mean wind speed is less than 1.0 mph. The lightly tinted areas at the boundaries are the percentage of hours spent in the implied intermediate directions (northeast, southeast, southwest, and northwest).

Best Time of Year to Visit

To characterize how pleasant the weather is in Ault throughout the year, we compute two travel scores.

The tourism score favors clear, rainless days with perceived temperatures between 65°F and 80°F. Based on this score, the best time of year to visit Ault for general outdoor tourist activities is from mid June to late August, with a peak score in the first week of July.

Tourism Score in Ault

Tourism Score in Aultbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810106.86.80.10.1NowNowprecipitationprecipitationcloudscloudstemperaturetemperaturetourism score
The tourism score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

The beach/pool score favors clear, rainless days with perceived temperatures between 75°F and 90°F. Based on this score, the best time of year to visit Ault for hot-weather activities is from late June to mid August, with a peak score in the second week of July.

Beach/Pool Score in Ault

Beach/Pool Score in Aultbest timeJanFebMarAprMayJunJulAugSepOctNovDec002244668810104.14.10.00.0NowNowprecipitationprecipitationcloudscloudstemperaturetemperature beach/pool score
The beach/pool score (filled area), and its constituents: the temperature score (red line), the cloud cover score (blue line), and the precipitation score (green line).

Methodology

For each hour between 8:00 AM and 9:00 PM of each day in the analysis period (1980 to 2016), independent scores are computed for perceived temperature, cloud cover, and total precipitation. Those scores are combined into a single hourly composite score, which is then aggregated into days, averaged over all the years in the analysis period, and smoothed.

Our cloud cover score is 10 for fully clear skies, falling linearly to 9 for mostly clear skies, and to 1 for fully overcast skies.

Our precipitation score, which is based on the three-hour precipitation centered on the hour in question, is 10 for no precipitation, falling linearly to 9 for trace precipitation, and to 0 for 0.04 inches of precipitation or more.

Our tourism temperature score is 0 for perceived temperatures below 50°F, rising linearly to 9 for 65°F, to 10 for 75°F, falling linearly to 9 for 80°F, and to 1 for 90°F or hotter.

Our beach/pool temperature score is 0 for perceived temperatures below 65°F, rising linearly to 9 for 75°F, to 10 for 82°F, falling linearly to 9 for 90°F, and to 1 for 100°F or hotter.

Growing Season

Definitions of the growing season vary throughout the world, but for the purposes of this report, we define it as the longest continuous period of non-freezing temperatures (≥ 32°F) in the year (the calendar year in the Northern Hemisphere, or from July 1 until June 30 in the Southern Hemisphere).

The growing season in Ault typically lasts for 5.1 months (157 days), from around May 1 to around October 5, rarely starting before April 12 or after May 19, and rarely ending before September 15 or after October 25.

Time Spent in Various Temperature Bands and the Growing Season in Ault

Time Spent in Various Temperature Bands and the Growing Season in Aultgrowing seasonJanFebMarAprMayJunJulAugSepOctNovDec0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%May 150%May 150%Oct 550%Oct 550%May 1990%May 1990%Sep 1590%Sep 1590%Apr 1210%Apr 1210%Oct 2510%Oct 2510%0%Feb 100%Feb 10Jul 16100%Jul 16100%NowNowfrigidfreezingvery coldcoolcomfortablewarmhotcold
frigid 15°F freezing 32°F very cold 45°F cold 55°F cool 65°F comfortable 75°F warm 85°F hot 95°F sweltering
The percentage of time spent in various temperature bands. The black line is the percentage chance that a given day is within the growing season.

Growing degree days are a measure of yearly heat accumulation used to predict plant and animal development, and defined as the integral of warmth above a base temperature, discarding any excess above a maximum temperature. In this report, we use a base of 50°F and a cap of 86°F.

Based on growing degree days alone, the first spring blooms in Ault should appear around April 5, only rarely appearing before March 22 or after April 21.

Growing Degree Days in Ault

Growing Degree Days in AultJanFebMarAprMayJunJulAugSepOctNovDec0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°FApr 590°FApr 590°FJun 27900°FJun 27900°FAug 101,800°FAug 101,800°FDec 312,740°FDec 312,740°FNowNow
The average growing degree days accumulated over the course of the year, with 25th to 75th and 10th to 90th percentile bands.

Solar Energy

This section discusses the total daily incident shortwave solar energy reaching the surface of the ground over a wide area, taking full account of seasonal variations in the length of the day, the elevation of the Sun above the horizon, and absorption by clouds and other atmospheric constituents. Shortwave radiation includes visible light and ultraviolet radiation.

The average daily incident shortwave solar energy experiences extreme seasonal variation over the course of the year.

The brighter period of the year lasts for 2.9 months, from May 9 to August 7, with an average daily incident shortwave energy per square meter above 6.8 kWh. The brightest day of the year is June 22, with an average of 7.9 kWh.

The darker period of the year lasts for 3.3 months, from November 2 to February 11, with an average daily incident shortwave energy per square meter below 3.4 kWh. The darkest day of the year is December 21, with an average of 2.3 kWh.

Average Daily Incident Shortwave Solar Energy in Ault

Average Daily Incident Shortwave Solar Energy in AultbrightdarkdarkJanFebMarAprMayJunJulAugSepOctNovDec0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWh8 kWh8 kWh9 kWh9 kWh10 kWh10 kWhJun 227.9 kWhJun 227.9 kWhDec 212.3 kWhDec 212.3 kWhMay 96.8 kWhMay 96.8 kWhAug 76.8 kWhAug 76.8 kWhNov 23.4 kWhNov 23.4 kWhFeb 113.4 kWhFeb 113.4 kWhNowNow
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

Topography

For the purposes of this report, the geographical coordinates of Ault are 40.582 deg latitude, -104.732 deg longitude, and 4,934 ft elevation.

The topography within 2 miles of Ault contains only modest variations in elevation, with a maximum elevation change of 131 feet and an average elevation above sea level of 4,929 feet. Within 10 miles contains only modest variations in elevation (738 feet). Within 50 miles contains significant variations in elevation (9,219 feet).

The area within 2 miles of Ault is covered by cropland (97%), within 10 miles by cropland (55%) and grassland (40%), and within 50 miles by grassland (59%) and cropland (18%).

Data Sources

This report illustrates the typical weather in Ault, based on a statistical analysis of historical hourly weather reports and model reconstructions from January 1, 1980 to December 31, 2016.

Temperature and Dew Point

There are 5 weather stations near enough to contribute to our estimation of the temperature and dew point in Ault.

For each station, the records are corrected for the elevation difference between that station and Ault according to the International Standard Atmosphere , and by the relative change present in the MERRA-2 satellite-era reanalysis between the two locations.

The estimated value at Ault is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Ault and a given station.

The stations contributing to this reconstruction are: Greeley-Weld County Airport (KGXY, 54%, 18 kilometers, southeast); Fort Collins-Loveland Municipal Airport (KFNL, 31%, 28 kilometers, southwest); Cheyenne Airport (KCYS, 7%, 64 kilometers, north); Pumpkin Vine (KPUM, 3.5%, 80 kilometers, northwest); and Kimball Municipal Airport-Robert E Arraj Field (KIBM, 4.0%, 112 kilometers, northeast).

Other Data

All data relating to the Sun's position (e.g., sunrise and sunset) are computed using astronomical formulas from the book, Astronomical Algorithms 2nd Edition , by Jean Meeus.

All other weather data, including cloud cover, precipitation, wind speed and direction, and solar flux, come from NASA's MERRA-2 Modern-Era Retrospective Analysis . This reanalysis combines a variety of wide-area measurements in a state-of-the-art global meteorological model to reconstruct the hourly history of weather throughout the world on a 50-kilometer grid.

Land Use data comes from the Global Land Cover SHARE database , published by the Food and Agriculture Organization of the United Nations.

Elevation data comes from the Shuttle Radar Topography Mission (SRTM) , published by NASA's Jet Propulsion Laboratory.

Names, locations, and time zones of places and some airports come from the GeoNames Geographical Database .

Time zones for airports and weather stations are provided by AskGeo.com .

Maps are © Esri, with data from National Geographic, Esri, DeLorme, NAVTEQ, UNEP-WCMC, USGS, NASA, ESA, METI, NRCAN, GEBCO, NOAA, and iPC.

Disclaimer

The information on this site is provided as is, without any assurances as to its accuracy or suitability for any purpose. Weather data is prone to errors, outages, and other defects. We assume no responsibility for any decisions made on the basis of the content presented on this site.

We draw particular cautious attention to our reliance on the MERRA-2 model-based reconstructions for a number of important data series. While having the tremendous advantages of temporal and spatial completeness, these reconstructions: (1) are based on computer models that may have model-based errors, (2) are coarsely sampled on a 50 km grid and are therefore unable to reconstruct the local variations of many microclimates, and (3) have particular difficulty with the weather in some coastal areas, especially small islands.

We further caution that our travel scores are only as good as the data that underpin them, that weather conditions at any given location and time are unpredictable and variable, and that the definition of the scores reflects a particular set of preferences that may not agree with those of any particular reader.