Weather in Seattle: August
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Average day temperature: | 77.8°F |
| Average night temperature: | 60.9°F | |
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Number of sunny days: | 18 days |
| Day length: | 13.4 - 14.9 hours | |
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Number of rainy days: | 1 day |
| Precipitation totals: | 0.3 in. | |
| more information | ||
14 days
forecast
forecast
| Seattle |
weather in
September
September
| Seattle |
Air temperature in August, °F
Show year:
2025
2024
2023
The highest day temperature during August of 2025 was 89°F. At the same time the lowest night temperature was 56°F. Daily and nightly averages during August were 75.4°F and 63.9°F.
Sunny, partly cloudy and cloudy days
Mostly all days in August are sunny but cloudy days are also possible.
Precipitation total in August, in.
Precipitation total value in Seattle in August is 0.3 in. Other months of the year show relatively similar values.
Wind speed in August, mph
The average wind speed value in August is 4.6 mph It makes August one of the least windy months of the year.
Average sunny hours
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in August is: 9.4.
Best time for vacation in Seattle
Seattle on a weather map
Places in USA:
Name
°F
24 Hours Forecast
Seattle
Local time: 23:49
December 05, friday
0000
45°F
NW
2 mph
2 mph
0300
46°F
N
2 mph
2 mph
0600
46°F
NW
3 mph
3 mph
0900
48°F
N
6 mph
6 mph
1200
52°F
N
12 mph
12 mph
1500
52°F
NE
12 mph
12 mph
1800
50°F
NE
14 mph
14 mph
2100
48°F
NE
16 mph
16 mph
