West Des Moines Climate by Month
West Des Moines, Iowa, United States
Hot summers and freezing winters, with rain spread through the year.
West Des Moines has hot summers and freezing winters, with rain spread through the year. Afternoon highs range from 32°F (0°C) in January to 87°F (30°C) in July, and January nights average 13°F (-10°C). It gets 34 in (860 mm) of rain a year, spread across the months.
- Warmest month
- 87°F(30°C)
- Average high, July
- Coldest nights
- 13°F(-10°C)
- Average low, January
- Rain per year
- 34 in(860 mm)
- No clear rainy season
- Humidity
- 72%
- Sunniest: July
Best and worst months in West Des Moines
Best for weatherThe most comfortable weather comes in May and September, with highs around 76°F (24°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)
West Des Moines weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 32°F(0°C) | 13°F(-10°C) | 0.9 in(24 mm) | 73% | 1.6 |
| FebFebruary | 37°F(3°C) | 17°F(-8°C) | 1.2 in(31 mm) | 81% | 2.6 |
| MarMarch | 50°F(10°C) | 29°F(-2°C) | 2.0 in(51 mm) | 74% | 3.8 |
| AprApril | 63°F(17°C) | 40°F(4°C) | 3.7 in(93 mm) | 62% | 4.5 |
| MayMayBest | 73°F(23°C) | 51°F(11°C) | 4.6 in(118 mm) | 68% | 5.3 |
| JunJune | 82°F(28°C) | 61°F(16°C) | 5.0 in(127 mm) | 72% | 6.0 |
| JulJuly | 87°F(30°C) | 65°F(19°C) | 3.5 in(89 mm) | 72% | 6.1 |
| AugAugust | 85°F(29°C) | 63°F(17°C) | 3.8 in(97 mm) | 74% | 5.5 |
| SepSeptemberBest | 78°F(26°C) | 54°F(12°C) | 3.3 in(84 mm) | 69% | 4.6 |
| OctOctober | 65°F(18°C) | 42°F(5°C) | 2.7 in(68 mm) | 65% | 3.0 |
| NovNovember | 49°F(9°C) | 29°F(-2°C) | 1.7 in(43 mm) | 75% | 1.9 |
| DecDecember | 36°F(2°C) | 18°F(-8°C) | 1.4 in(35 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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