Pullman Climate by Month
Pullman, Washington, United States
Warm summers and cold winters, with rain spread through the year.
Warm summers and cold winters, with rain spread through the year: that's Pullman's climate in short. August is the warmest month, with highs around 85°F (30°C); December is the coolest at 37°F (3°C), and nights dip to 25°F (-4°C). It gets 20 in (511 mm) of rain a year, spread across the months.
- Warmest month
- 85°F(30°C)
- Average high, August
- Coldest nights
- 25°F(-4°C)
- Average low, December
- Rain per year
- 20 in(511 mm)
- No clear rainy season
- Humidity
- 65%
- Sunniest: July
Best and worst months in Pullman
Best for weatherThe most comfortable weather comes in September, with highs around 75°F (24°C) and about 0.7 in (18 mm) of rain a month.
Least pleasantDecember and January are the least pleasant; December is the coldest, with highs of only 37°F (3°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)
Pullman weather by month
| Month | High | Low | Rain | Humidity | Sun |
|---|---|---|---|---|---|
| JanJanuary | 37°F(3°C) | 26°F(-4°C) | 2.5 in(63 mm) | 84% | 1.2 |
| FebFebruary | 42°F(5°C) | 28°F(-2°C) | 1.9 in(49 mm) | 73% | 2.2 |
| MarMarch | 49°F(9°C) | 32°F(0°C) | 2.2 in(55 mm) | 70% | 3.4 |
| AprApril | 57°F(14°C) | 36°F(2°C) | 1.7 in(44 mm) | 65% | 4.7 |
| MayMay | 66°F(19°C) | 42°F(6°C) | 1.7 in(44 mm) | 63% | 5.9 |
| JunJune | 73°F(23°C) | 47°F(8°C) | 1.3 in(32 mm) | 57% | 6.5 |
| JulJuly | 84°F(29°C) | 51°F(11°C) | 0.4 in(11 mm) | 43% | 7.2 |
| AugAugust | 85°F(30°C) | 50°F(10°C) | 0.6 in(15 mm) | 43% | 6.2 |
| SepSeptemberBest | 75°F(24°C) | 44°F(7°C) | 0.7 in(18 mm) | 52% | 4.4 |
| OctOctober | 60°F(16°C) | 35°F(2°C) | 1.8 in(46 mm) | 62% | 2.6 |
| NovNovember | 44°F(7°C) | 30°F(-1°C) | 2.7 in(68 mm) | 79% | 1.3 |
| DecDecember | 37°F(3°C) | 25°F(-4°C) | 2.6 in(66 mm) | 86% | 0.9 |
1991–2020 averages. Sun is solar radiation in kWh/m² per day. Highlighted: the most comfortable months.
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