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Get the Seattle WA weather forecast without ads, cookies, or tracking. Open-Meteo data, 10-day forecast, hourly conditions, and radar — all free. click here to hide this
July is the hottest month in Seattle WA, with an average high of 77°F / 25°C; December is the coldest (46°F / 8°C). November is the wettest month, averaging 6.3 in / 160 mm of precipitation.
| Month | High °F / °C | Low °F / °C | Precip in / mm | Wet days |
|---|---|---|---|---|
| Jan | 47 / 8 | 37 / 3 | 5.8 / 147 | 16 |
| Feb | 49 / 10 | 37 / 3 | 3.8 / 96 | 13 |
| Mar | 53 / 12 | 40 / 4 | 4.2 / 106 | 14 |
| Apr | 58 / 15 | 43 / 6 | 3.2 / 81 | 12 |
| May | 65 / 19 | 48 / 9 | 1.9 / 48 | 8 |
| Jun | 70 / 21 | 53 / 11 | 1.5 / 37 | 6 |
| Jul | 77 / 25 | 56 / 14 | 0.6 / 15 | 3 |
| Aug | 77 / 25 | 57 / 14 | 1.0 / 25 | 3 |
| Sep | 71 / 22 | 53 / 12 | 1.6 / 40 | 6 |
| Oct | 60 / 15 | 46 / 8 | 3.9 / 99 | 11 |
| Nov | 51 / 11 | 40 / 5 | 6.3 / 160 | 16 |
| Dec | 46 / 8 | 37 / 3 | 5.7 / 145 | 16 |
Extremes since 1948: highest 108°F / 42°C (June 28, 2021), lowest 0°F / -18°C (January 31, 1950).
Daylight lasts about 15.8 hours in June and 8.2 hours in December.
Data: Meteostat — Seattle-Tacoma Airport, 1991–2020 averages.
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