Weather in San Francisco, California, United States in September
In an average September, San Francisco sees a daily high around 75°F and a low around 55°F, based on 1981–2026 of local climate records.
| Average high | 75°F |
|---|---|
| Typical high range | 68°F to 84°F |
| Average low | 55°F |
| Typical low range | 52°F to 59°F |
| Average daily precipitation | 0.00 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
102°F
2020-09-06
Lowest
60°F
1981-09-24
Low
Highest
71°F
2017-09-02
Lowest
49°F
1985-09-30
Feels-like
Highest
111°F
2020-09-06
Lowest
44°F
2009-09-30
Humidity
Highest
15.4 g/m³
2017-09-05
Lowest
4.9 g/m³
1984-09-25
Wind
Highest
21 mph
2022-09-18
Lowest
5 mph
1982-09-16
Precip
Wettest
1.85 in
1989
Driest
0.01 in
1987
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