Climate normals · 1970–2000
Seattle Climate
Seattle is a city in United States (WA) with a population of about 780,995. Its average annual temperature is 11.1°C (52°F), with roughly 986 mm of rain per year.
11.1°C
Avg Temp
986
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
Seattle Climate
Seattle has an average annual temperature of 11.1°C (52°F) and receives about 986 mm of precipitation per year. The warmest month is August and the coldest is January. Figures are 1970–2000 climate normals.
11.1°C
Avg Temp
986
Precip (mm/yr)
Aug
Hottest Month
Jan
Coldest Month
| Month | Avg (°C/°F) | Precip |
|---|---|---|
| January | 5° / 41° | 133 mm |
| February | 6° / 43° | 104 mm |
| March | 8° / 46° | 103 mm |
| April | 10° / 50° | 74 mm |
| May | 13° / 55° | 47 mm |
| June | 16° / 60° | 40 mm |
| July | 18° / 65° | 24 mm |
| August | 19° / 65° | 31 mm |
| September | 16° / 60° | 45 mm |
| October | 11° / 52° | 83 mm |
| November | 7° / 45° | 144 mm |
| December | 5° / 41° | 158 mm |
1970–2000 normals from WorldClim 2.1 (~9 km grid). Precipitation can be less precise near mountains or coastlines, where rainfall varies sharply over short distances.
Best time to visit Seattle
The most comfortable months to visit Seattle are typically August, July and June, when temperatures are mildest and rainfall is relatively low. The hottest month is August (around 24°C high). The coldest is January (near 2°C low). December is usually the wettest month.
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Frequently Asked Questions
The most comfortable months to visit Seattle are typically August, July and June, when temperatures are mildest and rainfall is relatively low (1970–2000 climate normals).
Seattle, United States has an average annual temperature of 11.1°C and about 986 mm of precipitation per year. The warmest month is August and the coldest is January.
In August, the hottest month, daily highs in Seattle average about 24°C (75°F).
Monthly climate normals (1970–2000) sampled from WorldClim 2.1 at ~9 km resolution. Humidity derived from vapor pressure. City coordinates and population from GeoNames.