Climate averages 1991–2020
Des Moines weather
in July.
A hot, wet month: the warmest and the 8th driest of the year.
Long-term climate patterns, not a forecast for a particular trip.
July is a hot month in Des Moines: daytime highs average 28.7°C and nights cool to about 19.7°C. By daytime temperature it is the warmest month of the year.
Expect about 91 mm of rain on roughly 9 days, which makes July a wet month (the 8th driest of the 12 months). Daylight, from sunrise to sunset, lasts about 14 h 52 min on an average July day.
The nearest other city in this atlas is Cedar Rapids (169 km away). In July its highs average 27.7°C, 1.0°C cooler than Des Moines, with 100 mm of rain.
Among the 498 cities listed in the United States, Des Moines ranks joint 323rd of 498 for the warmest July highs and joint 318th of 498 for the driest July (rainfall, lowest first). The mean July high of those 498 cities is 30.3°C; Des Moines is 1.6°C cooler than that mean.
From July to August, average highs fall by 0.9°C to 27.8°C, and monthly rainfall rises from 91 mm to 94 mm.
The annual picture
July in context
Monthly precipitation
Average total · mmAverages from hourly ERA5 reanalysis data. Actual weather varies from year to year. How these numbers are calculated
Every month, side by side
Des Moines climate table
| Month | Average highHigh / low | Average low | Precipitation mm/month | Wet days ≥1 mm/day | Daylight hours/dayDaylight h/day |
|---|---|---|---|---|---|
| January | -1.3°C-10.1°C | -10.1°C | 31 | 6.3 | 9.510 h |
| February | 1.4°C-8.1°C | -8.1°C | 40 | 6.5 | 10.611 h |
| March | 8.9°C-1.6°C | -1.6°C | 67 | 8.8 | 11.912 h |
| April | 15.6°C5.1°C | 5.1°C | 107 | 11.2 | 13.313 h |
| May | 21.3°C11.7°C | 11.7°C | 135 | 13.6 | 14.515 h |
| June | 26.5°C17.2°C | 17.2°C | 126 | 11.5 | 15.115 h |
| July, selected | 28.7°C19.7°C | 19.7°C | 91 | 9.4 | 14.915 h |
| August | 27.8°C18.6°C | 18.6°C | 94 | 9.5 | 13.814 h |
| September | 23.9°C14.3°C | 14.3°C | 90 | 8.0 | 12.513 h |
| October | 16.6°C7.5°C | 7.5°C | 71 | 7.8 | 11.111 h |
| November | 8.6°C0.1°C | 0.1°C | 52 | 6.8 | 9.910 h |
| December | 1.5°C-6.5°C | -6.5°C | 41 | 5.9 | 9.29 h |
Precipitation (rain or snow, as water) is the average of the 30 separate monthly totals. A wet day is a local calendar day with at least 1 mm of precipitation. Daylight is the calculated sunrise-to-sunset length, not measured sunshine.
Compare places
July in nearby cities
- Cedar Rapids in JulyUnited States · 169 kmHigh 27.7°C · Low 18.8°C · 100 mm rain
- Iowa City in JulyUnited States · 173 kmHigh 28.2°C · Low 19.3°C · 95 mm rain
- Omaha in JulyUnited States · 198 kmHigh 29.6°C · Low 20.3°C · 88 mm rain
- Saint Joseph in JulyUnited States · 229 kmHigh 30.3°C · Low 21.3°C · 112 mm rain
- Sioux City in JulyUnited States · 251 kmHigh 28.7°C · Low 19.3°C · 75 mm rain
- Davenport in JulyUnited States · 252 kmHigh 28.5°C · Low 19.9°C · 91 mm rain
- Lincoln in JulyUnited States · 271 kmHigh 30.7°C · Low 20.9°C · 88 mm rain
- Rochester (Minnesota), United States in JulyUnited States · 285 kmHigh 26.5°C · Low 18.0°C · 97 mm rain
Read the numbers correctly
Climate, not a promise.
These patterns help compare months. They cannot tell you the weather on a specific day of your trip.
Sources, method and limitsHow these numbers are made (what the highs, lows and rain days mean, the sources and the model cell used for Des Moines) is explained once on the Des Moines year overview and on the Sources, method and limits page.