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Weather & Climate
Snohomish County, Washington, United States
Overview
Available climate summaries for Snohomish County. Origins and reference periods are unverified; stored values may include AI estimates. Treat these as estimates until independently verified.
Key Metrics
Annual Avg
8.3°C
Summer Avg
15.7°C
Winter Avg
1.4°C
Record High
36°C
Record Low
-18.3°C
Annual Precipitation
1837.8 mm
Avg Humidity
85%
Summer Humidity
79%
Winter Humidity
92%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 14.3° | 1.5° | -16.9° | 264.4 | 93% | 33 | 21.4 |
| Feb | 15.7° | 1.7° | -14.9° | 166.6 | 91% | 55 | 21.5 |
| Mar | 19.2° | 3.8° | -9.8° | 211.4 | 89% | 90 | 21.9 |
| Apr | 27.4° | 6.8° | -6.9° | 137.7 | 84% | 128 | 23.7 |
| May | 31.6° | 11° | -0.8° | 99.5 | 81% | 164 | 18.4 |
| Jun | 33.9° | 13.5° | 2.9° | 77.1 | 81% | 173 | 15.7 |
| Jul | 36° | 16.7° | 5.8° | 30.7 | 78% | 207 | 13.3 |
| Aug | 35.3° | 16.9° | 5.1° | 42.5 | 77% | 175 | 21.3 |
| Sep | 33.1° | 13.8° | 1.2° | 86.7 | 79% | 120 | 19.4 |
| Oct | 25.1° | 8.7° | -7° | 193.1 | 85% | 72 | 23.4 |
| Nov | 17.9° | 4° | -17.3° | 283.2 | 91% | 36 | 23.4 |
| Dec | 12.8° | 1° | -18.3° | 244.9 | 93% | 27 | 28.6 |
Data sources
Estimates and unverified origins
Oyster List climate data - Climate origins are unverified. Available methods include historical APIs and AI estimates; stored rows do not identify the original dataset, reference period, or model for each value. Treat these summaries as estimates until independently verified. Record updated 2026-03-22.
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