The temperatures in Seattle in August are comfortable with low of 12°C and and high up to 27°C.
The wather in Seattle in August can vary between cold and nice weather days. Expect a few rainy days but usually not more than 3.
Our weather forecast can give you a great sense of what weather to expect in Seattle in August 2025.
If you’re planning to visit Seattle in the near future, we highly recommend that you review the 14 day weather forecast for Seattle before you arrive.
Temperatures
27° / 12°
Rainy Days
1
Snowy Days
0
Dry Days
30
Rainfall
17
mm
Sun Hours
10.7
Hrs
