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August Weather in Des Moines, United States

Last updated: June 24, 2025

In Des Moines, United States, the average temperature in August is a comfortable 24°C (75°F), though it can dip to a cool 11°C (53°F) at night or soar to a sweltering 36°C (97°F) during the day. Expect 76 mm (3.0 in) of precipitation spread over 8 days, while the average humidity hovers around 77%.

August Temperature in Des Moines

In August in Des Moines, the average temperature is 24°C (75°F). The maximum can reach 36°C (97°F), and the minimum can be as low as 11°C (53°F). This mild climate makes it an ideal time for travelers to explore and enjoy outdoor activities in Des Moines.

August Weather in Des Moines: Daily Temperature Highs, Lows, and Averages

The chart illustrates August temperature patterns in Des Moines, showcasing daily minimum, maximum, and average temperatures. It highlights the typical range of temperatures throughout the month, providing insights into weather trends. In Des Moines, August typically has an average temperature of 24°C (75°F), with highs reaching up to 36°C (97°F) and lows dropping to around 11°C (53°F).
JanFebMarAprMayJunJulAugSepOctNovDec232440506375777469533931
Data source: Temperature data for Des Moines generated using information from the Copernicus Climate Change Service.
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The average of daily temperatures (24 hours) calculated across all days in the month.

August Precipitation in Des Moines

In Des Moines in August, the precipitation amount is 76 mm (3.0 in) spread over a duration of 8 days.

August Precipitation Trends in Des Moines

The chart displays monthly precipitation patterns in Des Moines, with values for each month alongside August’s data, which is highlighted for easy comparison. It shows the amount of precipitation, providing insights into how August’s conditions compare to those of other months. In Des Moines, August typically receives around 76 mm (3.0 inches) of precipitation spread over approximately 8 days.
JanFebMarAprMayJunJulAugSepOctNovDec4041837316612569761181314237
Data source: Precipitation data for August generated using information from the Copernicus Climate Change Service.
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August Humidity in Des Moines

In Des Moines in August humidity is 77%. With an average temperature of 24°C (75°F), this humidity feels like a warm, enveloping blanket that can make outdoor activities feel stifling and may require frequent breaks to stay hydrated while exploring.

August Average Humidity in Des Moines

This chart illustrates the average monthly humidity levels in Des Moines, with August’s data highlighted for easy comparison. It shows the fluctuation in humidity throughout the year, helping you understand how conditions vary by season. In August, average humidity in Des Moines is approximately 77%, offering insight into how humid the weather typically is during this month.
JanFebMarAprMayJunJulAugSepOctNovDec78%80%77%78%77%81%81%77%73%75%85%83%
Data source: Humidity data for August generated using information from the Copernicus Climate Change Service.

August UV Index in Des Moines

In Des Moines in August, the maximum UV index is 9, which corresponds to a very high Exposure Category. The time to burn is just 15 minutes, so it's essential to take precautions. For detailed information, you can check the Hourly UV Index in Des Moines.

Maximum UV Index Levels in Des Moines for August

The chart shows the monthly maximum UV Index (UVI) for Des Moines in August, representing the highest UV radiation level. The UVI measures the intensity of ultraviolet radiation from the sun, indicating the potential risk of sunburn and UV-related health issues. In August, the maximum UV index in Des Moines typically reaches 9, which falls under the very high exposure category.
JanFebMarAprMayJunJulAugSepOctNovDec35689111098643
Data source: Des Moines August UVI data generated using information from the Copernicus Climate Change Service.

UV Risk Categories

  •  Extreme (11+): Avoid the sun, stay in shade.
  •  Very High (8-10): Limit sun exposure.
  •  High (6-7): Use SPF 30+ and protective clothing.
  •  Moderate (3-5): Midday shade recommended.
  •  Low (0-2): No protection needed.

How August Weather in Des Moines Compares to Other Months

Weather in Des Moines varies notably across the year, with each month offering distinct climate conditions. This page compares August’s weather to other months in Des Moines, focusing on differences in temperature, rainfall, humidity, and UV levels.

This table compares monthly weather conditions in Des Moines, showing how August’s temperature, precipitation, humidity, and UV index levels differ from those of other months.
 TemperaturePrecipitationHumidityUV
January Weather-5°C (23°F)40 mm (1.6 inches)78%moderate
February Weather-4°C (24°F)41 mm (1.6 inches)80%moderate
March Weather4°C (40°F)83 mm (3.3 inches)77%high
April Weather10°C (50°F)73 mm (2.9 inches)77%very high
May Weather17°C (63°F)166 mm (6.5 inches)77%very high
June Weather24°C (75°F)125 mm (4.9 inches)81%extreme
July Weather25°C (78°F)69 mm (2.7 inches)81%very high
August Weather24°C (75°F)76 mm (3.0 inches)77%very high
September Weather20°C (69°F)118 mm (4.6 inches)73%very high
October Weather12°C (53°F)131 mm (5.2 inches)75%high
November Weather4°C (39°F)42 mm (1.6 inches)85%moderate
December Weather0°C (31°F)37 mm (1.4 inches)83%moderate

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