Weather in Seattle in August
August in Seattle is warm outdoor weather. Days are long enough to be useful. Shade starts to matter at midday.
In United States, this is how Seattle actually wears August, not how a country centroid would. August is the peak of the warm side of the year in Seattle. If you wanted the gentlest heat, this is not that month.
- Average temp
- 19°C
14–25°C
- Rainfall
- 25 mm
Not much rain
- Sunshine
- —
- Wind
- 11 km/h
What to expect
Daytime
Warm days in Seattle in August. A hat starts to earn its keep at midday. Evenings are the comfortable part of the clock.
You can walk at more hours than in the fierce months. Still build in a pause when the sun is high. Nights are easy.
Rain
August is on the drier side of the year in Seattle. Showers are possible. They do not define the month.
A shell that lives in the bag is enough. This is not November, and it should not be packed as if it were.
Evening
Evenings are cooler. A layer helps after sunset.
What to pack
A layer for cooler evenings
Where to stay in Seattle
Dates are a starting point for August.
Travel guides for Seattle
What to read before you book.
Average weather in Seattle
TemperatureRainfall
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FAQs about Seattle
Climate averages for Seattle, 1991–2020.
The best time to visit Seattle is between May and October, the most comfortable stretch of the year on these averages.
August is the hottest month, with an average around 19°C.
November is the wettest month, with about 160 mm of rain.
No. These are 1991–2020 climate normals from Meteostat, not a live forecast. Actual weather in any given week can differ.
