Unlock deeper multi-jurisdiction research
Full sub-pages, saves, and alerts are available on paid plans.
Weather & Climate
Seattle, Washington, United States
Overview
Climate data and monthly weather averages for Seattle.
Key Metrics
Annual Avg
10.5°C
Summer Avg
17.2°C
Winter Avg
4.3°C
Record High
38°C
Record Low
-10.4°C
Annual Precipitation
1231.2 mm
Avg Humidity
83%
Summer Humidity
78%
Winter Humidity
89%
Monthly Averages
| Month | High (°C) | Avg (°C) | Low (°C) | Rain (mm) | Humidity (%) | Sunshine (h) | Wind (kph) |
|---|---|---|---|---|---|---|---|
| Jan | 17.5° | 4.4° | -10.4° | 173.6 | 90% | 32 | 30.1 |
| Feb | 17.2° | 4.6° | -9.7° | 107.2 | 87% | 54 | 34.3 |
| Mar | 21.8° | 6.7° | -4° | 138.3 | 85% | 88 | 30.5 |
| Apr | 30.5° | 9° | -1.9° | 95.4 | 82% | 125 | 29.2 |
| May | 32.5° | 12.8° | -0.4° | 70.4 | 80% | 163 | 26.5 |
| Jun | 33.8° | 15.2° | 4.6° | 51.3 | 80% | 172 | 24 |
| Jul | 38° | 18.2° | 7.9° | 19.2 | 77% | 196 | 18.3 |
| Aug | 33° | 18.3° | 7.8° | 29.4 | 76% | 168 | 32.5 |
| Sep | 32.7° | 15.4° | 3.8° | 58.2 | 78% | 117 | 27 |
| Oct | 26.2° | 10.8° | -2.3° | 124.9 | 84% | 71 | 35.3 |
| Nov | 21.4° | 6.7° | -8.8° | 188.1 | 89% | 37 | 36.3 |
| Dec | 15.4° | 3.8° | -10.4° | 175.2 | 90% | 26 | 41.6 |
Frequently Asked Questions
Sources: NASA POWER · Last updated: 2025
Subscribe to unlock the full sub-page depth for additional jurisdictions.
You can keep discovering Oyster publicly, but full multi-jurisdiction depth, tracking, alerts, and exports are part of paid access.