Iowa weather in August 2025

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

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

Top Iowa destinations

Below are average maximum temperatures at popular countries, regions and places in Iowa in August. Select a holiday destination to see more weather parameters.

All Iowa destinations

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

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How hot is it in Iowa in August?

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

How sunny is it in Iowa in August?

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

Does it rain in Iowa in August?

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

Iowa August sunrise & sunset times

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

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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