Seattle, Washington, United States climate
Average temperatures, precipitation and all-time records for Seattle, Washington, United States, with every day graded against ~45 years of local climate history (1981–2026). Its warmest month is August, averaging a high of 75°F, and its coldest is December, with an average low of 35°F.
Seattle is the most populous city in the U.S. state of Washington and the Pacific Northwest region of North America. via Wikipedia
How today compares
Latest recorded day: 2026-07-21. Each reading placed on Seattle, Washington, United States's own ±7-day seasonal distribution.
Notable weather in Seattle
During the June 2021 Western North America heat wave, Seattle hit an all-time record 108°F, a temperature the normally mild city had never before approached. Read more →
Seattle average temperatures by month
Typical daily high and low, and average precipitation, for each month in Seattle, Washington, United States, based on 1981–2026 records. The wettest month is November (0.30 in on an average day).
| Month | Avg high | Avg low | Avg precip |
|---|---|---|---|
| January | 45°F | 35°F | 0.20 in |
| February | 47°F | 35°F | 0.20 in |
| March | 52°F | 38°F | 0.20 in |
| April | 56°F | 41°F | 0.10 in |
| May | 63°F | 46°F | 0.10 in |
| June | 67°F | 50°F | 0.10 in |
| July | 73°F | 55°F | 0.00 in |
| August | 75°F | 56°F | 0.00 in |
| September | 70°F | 52°F | 0.10 in |
| October | 60°F | 45°F | 0.20 in |
| November | 50°F | 39°F | 0.30 in |
| December | 44°F | 35°F | 0.20 in |
Each bar spans the 10th-percentile daily low to the 90th-percentile daily high (the range most days fall within), coloured cold → hot on a shared -10°F to 115°F scale, so the whole year's rhythm reads at a glance.
Thinking of visiting Seattle?
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Record extremes
- Hottest day on record: 107°F on 2021-06-28
- Coldest day on record: 3°F on 1989-02-03
Percentiles compare each day to Seattle, Washington, United States's own history, so grades are relative to this location: a “Near Record” day here isn't the same temperature as elsewhere. How the grades work →