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Seattle weather by month
Check out Seattle weather averages by month. Compare detailed monthly climate statistics including temperature, rainfall and sunshine figures.
Temperature in Seattle (°C)
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Max temperature (daytime) | 7 |
10 |
12 |
14 |
18 |
21 |
24 |
24 |
21 |
16 |
11 |
8 |
Min temperature (night-time) | 2 |
3 |
3 |
5 |
8 |
11 |
13 |
13 |
11 |
8 |
4 |
2 |
Heat & Humidity | 0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
0 |
Note: 0 = None, L = Low, M = Moderate, H = High, VH = Very high, E = Extreme
Sunshine & Daylight in Seattle
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Daily hours of sunshine | ||||||||||||
Daily hours of daylight | 9 |
10 |
12 |
14 |
15 |
16 |
16 |
14 |
13 |
11 |
9 |
8 |
UV Index (Maximum) | 1 |
2 |
3 |
5 |
6 |
7 |
7 |
6 |
5 |
3 |
1 |
1 |
Rainfall in Seattle
Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
---|---|---|---|---|---|---|---|---|---|---|---|---|
Number of days with some rain | 18 |
15 |
16 |
13 |
11 |
9 |
5 |
6 |
9 |
12 |
17 |
18 |
Average monthly rainfall (mm) | 149 |
105 |
95 |
66 |
46 |
41 |
20 |
31 |
49 |
87 |
149 |
151 |
More about Seattle
Seattle by month
Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Recommended for Washington State
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The climate guide for Washington State (Seattle) shows long term monthly weather averages processed from data supplied by CRU (University of East Anglia), the Met Office & the Netherlands Meteorological Institute. Find out more about our data sources.
What's the climate like in Seattle?
Seattle has a temperate climate with warm dry summers.
Metric (°C / mm) | Imperial (°F / inches)
More about the USA
Compare Seattle with the UK
Below the Seattle chart shows average maximum daytime temperature for Seattle, Washington, USA and the UK (London).
Maximum daytime temperature (°C)
Metric (°C / mm) | Imperial (°F / inches)
Compare more Seattle weather >>
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