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Weather & Climate
Walla Walla, Washington, United States
Overview
Climate data and monthly weather averages for Walla Walla.
Key Metrics
Annual Avg
8.4°C
Summer Avg
18.2°C
Winter Avg
-0.6°C
Record High
38.8°C
Record Low
-24.6°C
Annual Precipitation
681.7 mm
Avg Humidity
70%
Summer Humidity
56%
Winter Humidity
85%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 14.7° | -0.8° | -23.7° | 83.4 | 87% | 38 | 44.5 |
| Feb | 14.6° | 0.2° | -20° | 68.6 | 83% | 65 | 41.9 |
| Mar | 20.9° | 3.4° | -13.2° | 82.5 | 78% | 113 | 34.1 |
| Apr | 26.1° | 6.4° | -7.5° | 61.2 | 73% | 161 | 35.4 |
| May | 32° | 11.2° | -2.8° | 61.7 | 70% | 201 | 37 |
| Jun | 37.7° | 14.8° | 1.3° | 47.4 | 65% | 216 | 30.1 |
| Jul | 38.2° | 20.1° | 4.6° | 10.8 | 53% | 238 | 27.9 |
| Aug | 38.8° | 19.8° | 4.8° | 16.1 | 49% | 198 | 30 |
| Sep | 36.8° | 15.3° | -1.3° | 23.1 | 53% | 142 | 31.9 |
| Oct | 29.3° | 8.6° | -9.2° | 54.3 | 65% | 92 | 37.8 |
| Nov | 20° | 2.8° | -16.8° | 77.4 | 77% | 47 | 45.5 |
| Dec | 12.1° | -1.2° | -24.6° | 95.2 | 86% | 31 | 44.5 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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