Normal weather for Des Moines in August

It's warm in August in Des Moines with an average temperature of 26°C. Temperatures this month range from a low of 22°C to a high of 29°C. At night, you can expect temperatures between 14°C and 17°C.

In August, there is an average of 23 mm of precipitation, spread over 4 days. The wind speed is around 3 Bft, mostly coming from the West.

Des Moines in August		London
Average Temperature	26°C	22°C
High Temp	29°C	24°C
Low Temp	22°C	19°C
Total Precipitation	23 mm	60 mm
Rainy Days	4 days	10 days

Start of August

The month of August starts in Des Moines with hot temperatures, averaging around 28°C during the day and nights close to 17°C. There’s little chance of precipitation. The weather is mostly sunny and dry.

Since temperatures can differ between day and night, it’s a good idea to dress in layers. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal for the day. For the evening and morning, a shirt, maybe a light cardigan, and light trousers will do.

Mid-August

By mid-August, the average daytime temperature drops to around 27°C, with nights close to 17°C. Not much precipitation expected during this period. It’s mostly dry with sunshine.

Temperatures vary between day and night, so it’s smart to wear layers. Breezy clothes like shorts or a dress, plus a hat and sunglasses, are ideal for the day. For the evening and morning, a shirt, maybe a light cardigan, and light trousers will do.

End of August

By the end of August, the average daytime temperature in Des Moines will be around 25°C, with nights close to 15°C. Barely any chance of precipitation. The weather will mostly be dry with lots of sunshine.

As it gets cooler in the evening, it’s best to wear layers. A T-shirt, light trousers or skirt, and a light jacket are perfect for daytime. For the evening and morning, a shirt, maybe a light cardigan, and light trousers will do.

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UV index

The UV index is a maximum of 8 this month. That's a very high value on the intensity scale of 1 to 11. Unprotected skin can burn within 10-15 minutes.

Is August a good time to visit Des Moines?

Want nice weather? Then August is a great time to be in Des Moines. You’ll have pleasant temperatures and not too much rain this month.

Temperature records for Des Moines in August

With 36°C, Des Moines hit the highest temperature in the last 10 years in August 2020. The lowest daytime temperature in this month was 17°C in 2023. The extreme night temperatures ranged from a low of 10°C to a high of 22°C.

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Daily Temperature in August in Des Moines

This chart shows the average daily temperatures, both day and night, for each day in August in Des Moines, measured in degrees Celsius. The red line represents the maximum temperatures, while the blue line shows the minimums. The days of the month are displayed at the bottom of the chart. The data, based on historical observations, gives an overview of the average daily temperatures during this month.

Daily Precipitation in August in Des Moines

The chart below shows the average daily precipitation in August for Des Moines, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail. The days of the month are shown at the bottom of the chart.

A low average precipitation means that the chance of rain on that day is usually small, while a higher average suggests that rain is more likely. But it’s still an average, so each day can be different. Based on historical weather data for August, you can expect around 4 days of rain in Des Moines.

Daily Precipitation in August in Des Moines

Daily UV Index in August in Des Moines

This chart shows the average daily UV index in August in Des Moines, with the UV index ranging from 0 to a maximum of 11. The bottom of the chart shows the days of the month. Based on historical data, this chart provides an idea of the daily UV radiation levels you can expect.

Temperature in August in Des Moines Over the Years

This chart shows the average temperature in August in Des Moines, measured in degrees Celsius, over the past years.

Total Precipitation in August in Des Moines Over the Years

This chart shows the average precipitation in August in Des Moines, measured in millimetres over the past years. Precipitation is always measured as water, even if it’s snow or hail.

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Daily climate in August for Des Moines

Click on a specific day in August for detailed info on the typical weather on that day in Des Moines. Check out the historical temperatures and precipitation over the past 10 years on this day.

Average Weather in Des Moines by Month

Click on a month below to see detailed weather info for Des Moines. Based on historical weather data, you can see the average temperature, precipitation, wind, and UV index for each day of the month.