Weather in Seattle, Washington, United States in September
In an average September, Seattle sees a daily high around 70°F and a low around 52°F, based on 1981–2026 of local climate records.
| Average high | 70°F |
|---|---|
| Typical high range | 62°F to 78°F |
| Average low | 52°F |
| Typical low range | 47°F to 56°F |
| Average daily precipitation | 0.10 in |
September records
The most extreme September on record for each metric, across 1981–2026. For rainfall, the wettest and driest are by total September accumulation.
High
Highest
94°F
1988-09-02
Lowest
54°F
2007-09-30
Low
Highest
66°F
2017-09-05
Lowest
39°F
2019-09-30
Feels-like
Highest
106°F
1988-09-02
Lowest
34°F
1983-09-29
Humidity
Highest
15.6 g/m³
2010-09-27
Lowest
5.2 g/m³
1985-09-28
Wind
Highest
17 mph
2013-09-29
Lowest
2 mph
2005-09-16
Precip
Wettest
7.29 in
2013
Driest
0.19 in
2022
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