Des Moines, Iowa Climate by Month
Des Moines, Iowa, United States
Hot summers and freezing winters, with rain spread through the year.
Des Moines has hot summers and freezing winters, with rain spread through the year. July is the warmest month, with highs around 87°F (31°C); January is the coolest at 32°F (0°C), and nights dip to 13°F (-10°C). It gets 34 in (876 mm) of rain a year, spread across the months.
- Warmest month
- 87°F(31°C)
- Average high, July
- Coldest nights
- 13°F(-10°C)
- Average low, January
- Rain per year
- 34 in(876 mm)
- No clear rainy season
- Humidity
- 71%
- Sunniest: July
Best and worst months in Des Moines
Best for weatherMay and September are the best time for weather in Des Moines: highs near 76°F (25°C) and about 4.0 in (101 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; January is the coldest, with highs of only 32°F (0°C).
Comfort combines how close the afternoon high is to 75°F (24°C) with how much rain falls and how humid it is. See where the weather is best in September.
Temperature and rain through the year
Highs and lows (°F)
Average highAverage low
Rain (in per month)
Des Moines weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 32°F(0°C) | 13°F(-10°C) | 1.0 in(25 mm) | 73% | 1.6 |
| FebFebruary | 37°F(3°C) | 17°F(-8°C) | 1.3 in(33 mm) | 80% | 2.6 |
| MarMarch | 50°F(10°C) | 29°F(-2°C) | 2.1 in(53 mm) | 73% | 3.8 |
| AprApril | 63°F(17°C) | 40°F(5°C) | 3.8 in(96 mm) | 61% | 4.5 |
| MayMayBest | 74°F(23°C) | 51°F(11°C) | 4.7 in(119 mm) | 67% | 5.3 |
| JunJune | 83°F(28°C) | 62°F(16°C) | 5.0 in(128 mm) | 70% | 6.0 |
| JulJuly | 87°F(31°C) | 66°F(19°C) | 3.6 in(91 mm) | 70% | 6.1 |
| AugAugust | 85°F(30°C) | 63°F(17°C) | 3.9 in(98 mm) | 73% | 5.4 |
| SepSeptemberBest | 78°F(26°C) | 55°F(13°C) | 3.3 in(83 mm) | 68% | 4.6 |
| OctOctober | 65°F(18°C) | 42°F(6°C) | 2.7 in(69 mm) | 64% | 2.9 |
| NovNovember | 49°F(9°C) | 29°F(-1°C) | 1.7 in(44 mm) | 74% | 1.9 |
| DecDecember | 36°F(2°C) | 19°F(-7°C) | 1.5 in(37 mm) | 80% | 1.5 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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