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Weather & Climate
Whatcom County, , United States
Overview
Climate data and monthly weather averages for Whatcom County.
Key Metrics
Annual Avg
6.4°C
Summer Avg
14.8°C
Winter Avg
-1.4°C
Record High
35.5°C
Record Low
-25.8°C
Annual Precipitation
1812.8 mm
Avg Humidity
86%
Summer Humidity
78%
Winter Humidity
94%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 11.8° | -1.2° | -24.6° | 256.7 | 94% | 33 | 21.9 |
| Feb | 14.8° | -1.1° | -21.9° | 151.8 | 92% | 55 | 20.7 |
| Mar | 17.4° | 1.3° | -19.8° | 205.8 | 91% | 90 | 21 |
| Apr | 26.4° | 4.7° | -11.8° | 127.5 | 85% | 128 | 20.7 |
| May | 29° | 9.9° | -3.5° | 96.7 | 80% | 164 | 17.4 |
| Jun | 33.7° | 12.5° | 1° | 80.7 | 80% | 173 | 14.4 |
| Jul | 35.5° | 15.9° | 4.8° | 41.5 | 77% | 207 | 14.5 |
| Aug | 35.1° | 16° | 4.9° | 48.1 | 77% | 175 | 20.6 |
| Sep | 33° | 12.5° | -1.5° | 97.2 | 79% | 120 | 16.2 |
| Oct | 25.8° | 7° | -10.8° | 197.2 | 85% | 72 | 20.1 |
| Nov | 16.8° | 1.7° | -21.7° | 279.3 | 93% | 36 | 25.2 |
| Dec | 10.4° | -1.9° | -25.8° | 230.3 | 95% | 27 | 24.9 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
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