Des Moines, Washington Climate by Month
Des Moines, Washington, United States
Warm summers and cool winters, with rain spread through the year.
Warm summers and cool winters, with rain spread through the year: that's Des Moines's climate in short. Afternoon highs range from 46°F (8°C) in December to 76°F (24°C) in August, and December nights average 35°F (2°C). It gets 37 in (943 mm) of rain a year, spread across the months.
- Warmest month
- 76°F(24°C)
- Average high, August
- Coldest nights
- 35°F(2°C)
- Average low, December
- Rain per year
- 37 in(943 mm)
- No clear rainy season
- Humidity
- 74%
- Sunniest: July
Best and worst months in Des Moines
Best for weatherJuly and August are the best time for weather in Des Moines: highs near 75°F (24°C) and about 0.8 in (21 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; December is the coldest, with highs of only 46°F (8°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 July.
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 | 47°F(8°C) | 35°F(2°C) | 5.3 in(135 mm) | 80% | 1.0 |
| FebFebruary | 49°F(10°C) | 36°F(2°C) | 3.6 in(92 mm) | 76% | 1.9 |
| MarMarch | 53°F(12°C) | 37°F(3°C) | 4.2 in(106 mm) | 78% | 2.7 |
| AprApril | 58°F(15°C) | 41°F(5°C) | 2.8 in(72 mm) | 75% | 4.1 |
| MayMay | 65°F(18°C) | 46°F(8°C) | 1.7 in(42 mm) | 67% | 5.2 |
| JunJune | 69°F(21°C) | 50°F(10°C) | 1.4 in(36 mm) | 69% | 5.5 |
| JulJulyBest | 75°F(24°C) | 53°F(12°C) | 0.7 in(17 mm) | 68% | 6.0 |
| AugAugustBest | 76°F(24°C) | 53°F(12°C) | 1.0 in(25 mm) | 67% | 5.2 |
| SepSeptember | 70°F(21°C) | 50°F(10°C) | 1.5 in(38 mm) | 73% | 3.8 |
| OctOctober | 60°F(16°C) | 44°F(7°C) | 3.6 in(91 mm) | 75% | 2.0 |
| NovNovember | 51°F(11°C) | 39°F(4°C) | 5.7 in(146 mm) | 79% | 1.1 |
| DecDecember | 46°F(8°C) | 35°F(2°C) | 5.6 in(143 mm) | 82% | 0.8 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
Places with a similar climate outside the United States
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- 🇺🇸BellinghamWashington, United States · Pop. 85k99%matchWetter summersDes Moines vs Bellingham →
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- 🇺🇸PortlandOregon, United States · Pop. 653k94%matchHotter summersMore sunDes Moines vs Portland →
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- 🇨🇦Campbell RiverBritish Columbia, Canada · Pop. 33k93%matchWetter summersLess sunDes Moines vs Campbell River →