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Winter Weather in Des Moines Iowa, United States

Daily high temperatures are around 38°F, rarely falling below 15°F or exceeding 61°F. The lowest daily average high temperature is 32°F on January 5.

Daily low temperatures are around 21°F, rarely falling below -3°F or exceeding 39°F. The lowest daily average low temperature is 17°F on January 22.

For reference, on July 19, the hottest day of the year, temperatures in Des Moines typically range from 68°F to 86°F, while on January 21, the coldest day of the year, they range from 17°F to 33°F.

Average High and Low Temperature in the Winter in Des Moines

Average High and Low Temperature in the Winter in Des MoinesDecJanFeb0°F0°F10°F10°F20°F20°F30°F30°F40°F40°F50°F50°F60°F60°F70°F70°F80°F80°FFallSpringJan 532°FJan 532°F17°F17°FDec 141°FDec 141°F26°F26°FFeb 2843°FFeb 2843°F25°F25°FFeb 133°FFeb 133°F17°F17°F
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 hourly average winter temperatures. The horizontal axis is the day, 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 the Winter in Des Moines

Average Hourly Temperature in the Winter in Des MoinesDecJanFeb12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMFallSpringfreezingvery coldvery coldcoldcold
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.

Hwado, South Korea (6,391 miles away) is the far-away foreign place with temperatures most similar to Des Moines (view comparison).

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The winter in Des Moines experiences essentially constant cloud cover, with the percentage of time that the sky is overcast or mostly cloudy remaining about 53% throughout the season. The highest chance of overcast or mostly cloudy conditions is 54% on February 13.

The clearest day of the winter is December 1, with clear, mostly clear, or partly cloudy conditions 49% of the time.

For reference, on February 13, the cloudiest day of the year, the chance of overcast or mostly cloudy conditions is 54%, while on August 25, the clearest day of the year, the chance of clear, mostly clear, or partly cloudy skies is 70%.

Cloud Cover Categories in the Winter in Des Moines

Cloud Cover Categories in the Winter in Des MoinesDecJanFeb0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%FallSpringAug 2570%Aug 2570%Dec 149%Dec 149%Feb 2848%Feb 2848%Jan 146%Jan 146%Feb 147%Feb 147%clearmostly clearpartly cloudyovercastmostly cloudy
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.

A wet day is one with at least 0.04 inches of liquid or liquid-equivalent precipitation. In Des Moines, the chance of a wet day over the course of the winter is gradually decreasing, starting the season at 17% and ending it at 15%.

For reference, the year's highest daily chance of a wet day is 43% on June 25, and its lowest chance is 8% on January 9.

Over the course of the winter in Des Moines, the chance of a day with only rain remains an essentially constant 6% throughout, the chance of a day with mixed snow and rain remains an essentially constant 2% throughout, and the chance of a day with only snow remains an essentially constant 4% throughout.

Probability of Precipitation in the Winter in Des Moines

Probability of Precipitation in the Winter in Des MoinesDecJanFeb0%0%5%5%10%10%15%15%20%20%25%25%FallSpringJan 98%Jan 98%Dec 117%Dec 117%Feb 2815%Feb 2815%Feb 111%Feb 111%snowmixedrain
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 season and not just the monthly totals, we show the rainfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day rainfall during the winter in Des Moines is essentially constant, remaining about 0.6 inches throughout, and rarely exceeding 2.1 inches or falling below -0.0 inches.

The lowest average 31-day accumulation is 0.2 inches on January 21.

Average Monthly Rainfall in the Winter in Des Moines

Average Monthly Rainfall in the Winter in Des MoinesDecJanFeb0.0 in0.0 in0.5 in0.5 in1.0 in1.0 in1.5 in1.5 in2.0 in2.0 in2.5 in2.5 in3.0 in3.0 in3.5 in3.5 in4.0 in4.0 inFallSpringJan 200.2 inJan 200.2 inDec 11.0 inDec 11.0 inFeb 280.9 inFeb 280.9 inJan 10.4 inJan 10.4 inFeb 10.3 inFeb 10.3 in
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 snowfall.

Snowfall

As with rainfall, we consider the snowfall accumulated over a sliding 31-day period centered around each day.

The average sliding 31-day snowfall during the winter in Des Moines is gradually decreasing, starting the season at 2.7 inches, when it rarely exceeds 8.6 inches, and ending the season at 2.1 inches, when it rarely exceeds 5.5 inches.

The highest average 31-day accumulation is 3.4 inches on December 19.

Average Monthly Snowfall in the Winter in Des Moines

Average Monthly Snowfall in the Winter in Des MoinesDecJanFeb0 in0 in2 in2 in4 in4 in6 in6 in8 in8 in10 in10 inFallSpringDec 193.4 inDec 193.4 inDec 12.7 inDec 12.7 inFeb 282.1 inFeb 282.1 inJan 13.3 inJan 13.3 inFeb 13.1 inFeb 13.1 in
The average 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.

Over the course of the winter in Des Moines, the length of the day is rapidly increasing. From the start to the end of the season, the length of the day increases by 1 hour, 51 minutes, implying an average daily increase of 1 minute, 15 seconds, and weekly increase of 8 minutes, 46 seconds.

The shortest day of the winter is December 21, with 9 hours, 10 minutes of daylight and the longest day is February 28, with 11 hours, 14 minutes of daylight.

Hours of Daylight and Twilight in the Winter in Des Moines

Hours of Daylight and Twilight in the Winter in Des MoinesDecJanFeb0 hr24 hr4 hr20 hr8 hr16 hr12 hr12 hr16 hr8 hr20 hr4 hr24 hr0 hrFallSpringDec 219 hr, 10 minDec 219 hr, 10 minnightnightdaydayFeb 2811 hr, 14 minFeb 2811 hr, 14 minFeb 110 hr, 5 minFeb 110 hr, 5 min
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 latest sunrise of the winter in Des Moines is 7:41 AM on January 4 and the earliest sunrise is 51 minutes earlier at 6:50 AM on February 28.

The earliest sunset is 4:44 PM on December 8 and the latest sunset is 1 hour, 20 minutes later at 6:04 PM on February 28.

Daylight saving time is observed in Des Moines during 2024, but it neither starts nor ends during the winter, so the entire season is in daylight saving time.

For reference, on June 20, the longest day of the year, the Sun rises at 5:40 AM and sets 15 hours, 12 minutes later, at 8:52 PM, while on December 21, the shortest day of the year, it rises at 7:38 AM and sets 9 hours, 10 minutes later, at 4:47 PM.

Sunrise & Sunset with Twilight and Daylight Saving Time in the Winter in Des Moines

Sunrise & Sunset with Twilight and Daylight Saving Time in the Winter in Des MoinesDecJanFeb12 AM2 AM4 AM6 AM8 AM10 AM12 PM2 PM4 PM6 PM8 PM10 PM12 AMFallSpring6:50 AM6:50 AMFeb 286:04 PMFeb 286:04 PM7:29 AM7:29 AMDec 84:44 PMDec 84:44 PM7:41 AM7:41 AMJan 44:58 PMJan 44:58 PM7:25 AM7:25 AMFeb 15:30 PMFeb 15:30 PMSolarMidnightSolarMidnightSolarNoonSunriseSunset
The solar day in the winter. 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 figure below presents a compact representation of the sun's elevation (the angle of the sun above the horizon) and azimuth (its compass bearing) for every hour of every day in the reporting period. The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation.

Solar Elevation and Azimuth in the Winter in Des Moines

Solar Elevation and Azimuth in the Winter in Des MoinesDecJanFeb12 AM12 AM2 AM2 AM4 AM4 AM6 AM6 AM8 AM8 AM10 AM10 AM12 PM12 PM2 PM2 PM4 PM4 PM6 PM6 PM8 PM8 PM10 PM10 PM12 AM12 AMFallSpring010203001020
northeastsouthwest
Solar elevation and azimuth in the the winter of 2024. The black lines are lines of constant solar elevation (the angle of the sun above the horizon, in degrees). The background color fills indicate the azimuth (the compass bearing) of the sun. The lightly tinted areas at the boundaries of the cardinal compass points indicate the implied intermediate directions (northeast, southeast, southwest, and northwest).

The figure below presents a compact representation of key lunar data for the winter of 2024. 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. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.

Moon Rise, Set & Phases in the Winter in Des Moines

Moon Rise, Set & Phases in the Winter in Des MoinesDecJanFeb12 AM12 AM4 AM4 AM8 AM8 AM12 PM12 PM4 PM4 PM8 PM8 PM12 AM12 AMFallSpringNov 17:48 AMNov 17:48 AMNov 153:29 PMNov 153:29 PMDec 112:22 AMDec 112:22 AMDec 153:02 AMDec 153:02 AMDec 304:28 PMDec 304:28 PMJan 134:28 PMJan 134:28 PMJan 296:37 AMJan 296:37 AMFeb 127:54 AMFeb 127:54 AMFeb 276:45 PMFeb 276:45 PMMar 141:55 AMMar 141:55 AMMar 295:58 AMMar 295:58 AM5:59 PM5:59 PM8:15 AM8:15 AM8:05 AM8:05 AM4:44 PM4:44 PM8:16 AM8:16 AM7:53 AM7:53 AM4:26 PM4:26 PM4:45 PM4:45 PM8:33 AM8:33 AM7:55 AM7:55 AM5:44 PM5:44 PM4:51 PM4:51 PM7:32 AM7:32 AM6:51 AM6:51 AM5:52 PM5:52 PM6:57 PM6:57 PM7:37 AM7:37 AM8:18 PM8:18 PM
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.

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 chance that a given day will be muggy in Des Moines is essentially constant during the winter, remaining around 0% throughout.

For reference, on July 20, the muggiest day of the year, there are muggy conditions 55% of the time, while on November 14, the least muggy day of the year, there are muggy conditions 0% of the time.

Humidity Comfort Levels in the Winter in Des Moines

Humidity Comfort Levels in the Winter in Des MoinesDecJanFeb0%0%10%10%20%20%30%30%40%40%50%50%60%60%70%70%80%80%90%90%100%100%FallSpringDec 10%Dec 10%Feb 280%Feb 280%Jan 10%Jan 10%Feb 10%Feb 10%drydrycomfortablecomfortable
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.

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 Des Moines is increasing during the winter, increasing from 11.3 miles per hour to 12.3 miles per hour over the course of the season.

For reference, on March 31, the windiest day of the year, the daily average wind speed is 12.8 miles per hour, while on August 2, the calmest day of the year, the daily average wind speed is 8.0 miles per hour.

The lowest daily average wind speed during the winter is 11.1 miles per hour on December 5.

Average Wind Speed in the Winter in Des Moines

Average Wind Speed in the Winter in Des MoinesDecJanFeb0 mph0 mph5 mph5 mph10 mph10 mph15 mph15 mph20 mph20 mphFallSpringDec 511.1 mphDec 511.1 mphFeb 2812.3 mphFeb 2812.3 mphJan 111.7 mphJan 111.7 mphFeb 111.9 mphFeb 111.9 mph
The average of mean hourly wind speeds (dark gray line), with 25th to 75th and 10th to 90th percentile bands.

The wind direction in Des Moines during the winter is predominantly out of the west from December 1 to January 2 and the north from January 2 to February 28.

Wind Direction in the Winter in Des Moines

Wind Direction in the Winter in Des MoinesSWNDecJanFeb0%100%20%80%40%60%60%40%80%20%100%0%FallSpringwestsoutheastnorth
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).

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 Des Moines typically lasts for 6.1 months (188 days), from around April 12 to around October 16, rarely starting before March 27 or after April 28, and rarely ending before September 26 or after November 6.

The winter in Des Moines is reliably fully outside of the growing season.

Time Spent in Various Temperature Bands and the Growing Season in the Winter in Des Moines

Time Spent in Various Temperature Bands and the Growing Season in the Winter in Des MoinesDecJanFeb0%100%10%90%20%80%30%70%40%60%50%50%60%40%70%30%80%20%90%10%100%0%FallSpring0%Jan 150%Jan 15Nov 610%Nov 610%frigidfreezingvery coldcoldcoolcomfortable
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.

The average accumulated growing degree days in Des Moines are very rapidly decreasing during the winter, decreasing by 3,569°F, from 3,580°F to 11°F, over the course of the season.

Growing Degree Days in the Winter in Des Moines

Growing Degree Days in the Winter in Des MoinesDecJanFeb0°F0°F500°F500°F1,000°F1,000°F1,500°F1,500°F2,000°F2,000°F2,500°F2,500°F3,000°F3,000°F3,500°F3,500°FFallSpringDec 13,580°FDec 13,580°FFeb 2811°FFeb 2811°F
The average growing degree days accumulated over the course of the winter, with 25th to 75th and 10th to 90th percentile bands.

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 in Des Moines is rapidly increasing during the winter, rising by 1.6 kWh, from 2.0 kWh to 3.6 kWh, over the course of the season.

The lowest average daily incident shortwave solar energy during the winter is 1.8 kWh on December 21.

Average Daily Incident Shortwave Solar Energy in the Winter in Des Moines

Average Daily Incident Shortwave Solar Energy in the Winter in Des MoinesDecJanFeb0 kWh0 kWh1 kWh1 kWh2 kWh2 kWh3 kWh3 kWh4 kWh4 kWh5 kWh5 kWh6 kWh6 kWh7 kWh7 kWhFallSpringDec 211.8 kWhDec 211.8 kWhDec 12.0 kWhDec 12.0 kWhFeb 283.6 kWhFeb 283.6 kWhFeb 12.6 kWhFeb 12.6 kWh
The average daily shortwave solar energy reaching the ground per square meter (orange line), with 25th to 75th and 10th to 90th percentile bands.

For the purposes of this report, the geographical coordinates of Des Moines are 41.601 deg latitude, -93.609 deg longitude, and 869 ft elevation.

The topography within 2 miles of Des Moines contains only modest variations in elevation, with a maximum elevation change of 197 feet and an average elevation above sea level of 830 feet. Within 10 miles also contains only modest variations in elevation (262 feet). Within 50 miles contains only modest variations in elevation (741 feet).

The area within 2 miles of Des Moines is covered by artificial surfaces (100%), within 10 miles by cropland (46%) and artificial surfaces (43%), and within 50 miles by cropland (88%).

This report illustrates the typical weather in Des Moines, 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 3 weather stations near enough to contribute to our estimation of the temperature and dew point in Des Moines.

For each station, the records are corrected for the elevation difference between that station and Des Moines 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 Des Moines is computed as the weighted average of the individual contributions from each station, with weights proportional to the inverse of the distance between Des Moines and a given station.

The stations contributing to this reconstruction are:

To get a sense of how much these sources agree with each other, you can view a comparison of Des Moines and the stations that contribute to our estimates of its temperature history and climate. Please note that each source's contribution is adjusted for elevation and the relative change present in the MERRA-2 data.

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 © OpenStreetMap contributors.

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.

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