Des Moines weather in August 2025

Expect 29°C daytime maximum temperatures in the shade with on average 10 hours of sunshine per day in Des Moines in August. Check more long-term weather averages for Des Moines in August before you book your next holiday to Iowa in 2025/2026.

  • 29°C maximum daytime temperature in August in Des Moines29
    29°C max day temperature
  • 10 hours of sunshine per day
  • 9 days with some rainfall in August in Des Moines9
    9 days with some rainfall
  • 17°C minimum night-time temperature in August in Des Moines17
    17°C min night temperature
  • 14 hours of daylight per day in August in Des Moines14
    14 hours of daylight per day
  • Moderate heat & humidity in August in Des MoinesM
    Moderate heat & humidity
  • 105 mm monthly rainfall in August in Des Moines105
    105 mm of monthly rainfall
  • UV (maximum) index 8 (Very High) in August in Des Moines8
    8 (Very High) UV index

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The August weather guide for Iowa (Des Moines) shows long term weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.

Metric (°C / mm)  |  Imperial (°F / inches)

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How hot is it in Des Moines in August?

Daytime temperatures usually reach 29°C in Des Moines in August with moderate heat and humidity, falling to 17°C at night.

How sunny is it in Des Moines in August?

There are normally 10 hours of bright sunshine each day in Des Moines in August - that's 69% of daylight hours.

Does it rain in Des Moines in August?

There are usually 9 days with some rain in Des Moines in August and the average monthly rainfall is 105mm.

Des Moines August sunrise & sunset times

Browse the sunrise and sunset times for Des Moines in August 2025. Select a month to view Des Moines sunrise and sunset times for the next 12 months.

JanFebMarAprMayJunJulAugSepOctNovDec

Date Sunrise times Sunset times
Friday, 1st August 2025 05:09 19:32
Saturday, 16th August 2025 05:25 19:12
Sunday, 31st August 2025 05:40 18:49

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