Weather in Seattle
Live weather and 7-day forecast for Seattle, United States, followed by what to expect in each month of the year.
Sunrise 07:39 Sunset 18:10 Daylight 10h 31m Sun times →
Next 24 hours
7-day forecast
Forecast data from Open-Meteo
Climate in Seattle: month by month
Averaged over 2023–2025, the warmest month in Seattle is July, with highs around 27 °C (80 °F) and lows around 15 °C (58 °F); the coolest is January, with highs around 8 °C (46 °F) and lows around 3 °C (37 °F).
Seattle gets about 1,069 mm (42 in) of precipitation a year. The wettest month is December (219 mm over about 20 days) and the driest is July (8 mm).
| Month | Avg high | Avg low | Precipitation (in) | Wet days | Daylight |
|---|---|---|---|---|---|
| January | 46° | 37° | 5.2 | 15 | 8h 52m |
| February | 47° | 37° | 4.0 | 14 | 10h 17m |
| March | 53° | 40° | 4.1 | 15 | 11h 52m |
| April | 58° | 43° | 3.2 | 14 | 13h 38m |
| May | 67° | 49° | 1.7 | 9 | 15h 8m |
| June | 71° | 53° | 1.3 | 6 | 15h 58m |
| July | 80° | 58° | 0.3 | 2 | 15h 36m |
| August | 78° | 60° | 1.6 | 6 | 14h 17m |
| September | 71° | 56° | 2.0 | 6 | 12h 36m |
| October | 60° | 48° | 3.9 | 14 | 10h 54m |
| November | 52° | 43° | 6.2 | 17 | 9h 19m |
| December | 50° | 41° | 8.6 | 20 | 8h 27m |
Averages of daily values from the ERA5 reanalysis for 2023–2025 at Seattle's coordinates (model elevation 59 m), via Open-Meteo (CC BY 4.0). Three recent years are not a 30-year climate normal; reanalysis smooths local extremes and tends to count more light-rain days than a rain gauge would. Daylight is sunrise to sunset on the 15th of each month.
Weather questions for Seattle
What is the hottest month in Seattle?
July, with average highs of 27 °C (80 °F) and lows of 15 °C (58 °F) over 2023–2025. The coolest month is January, averaging 8 °C (46 °F) by day and 3 °C (37 °F) at night.
What is the rainiest month in Seattle?
December, with about 219 mm of precipitation on roughly 20 days. The driest month is July (8 mm), and the yearly total is around 1,069 mm.
When is the weather mildest in Seattle?
Going by the averages, May–September are the months with average daytime highs between 18 °C and 27 °C (64–81 °F) — warm but not hot. December is the month most likely to bring rain.
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About this forecast
The live forecast comes from Open-Meteo, which blends models from national weather services and is fetched fresh in your browser on each visit. Times in the hourly outlook are Seattle local time (America/Los_Angeles).