Click on a day for an hourly weather forecast
The temperatures in Des Moines in August are comfortable with low of 17°C and and high up to 28°C.
You can expect about 3 to 8 days of rain in Des Moines during the month of August. It’s a good idea to bring along your umbrella so that you don’t get caught in poor weather.
Our weather forecast can give you a great sense of what weather to expect in Des Moines in August 2025.
If you’re planning to visit Des Moines in the near future, we highly recommend that you review the 14 day weather forecast for Des Moines before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -2° / -9° | 3 | 16 | 12 | 44 mm | Awful | Des Moines in January |
| February | -1° / -8° | 2 | 15 | 11 | 54 mm | Awful | Des Moines in February |
| March | 9° / 1° | 7 | 18 | 6 | 103 mm | Awful | Des Moines in March |
| April | 15° / 6° | 8 | 20 | 2 | 137 mm | Bad | Des Moines in April |
| May | 21° / 12° | 9 | 22 | 0 | 218 mm | Ok | Des Moines in May |
| June | 27° / 17° | 9 | 21 | 0 | 208 mm | Good | Des Moines in June |
| July | 28° / 18° | 7 | 24 | 0 | 126 mm | Good | Des Moines in July |
| August | 28° / 17° | 7 | 24 | 0 | 157 mm | Good | Des Moines in August |
| September | 25° / 13° | 6 | 24 | 0 | 128 mm | Perfect | Des Moines in September |
| October | 17° / 7° | 5 | 25 | 1 | 97 mm | Good | Des Moines in October |
| November | 9° / 1° | 4 | 23 | 3 | 71 mm | Bad | Des Moines in November |
| December | 2° / -5° | 3 | 19 | 8 | 56 mm | Awful | Des Moines in December |