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Record Low Temperature in San Francisco, CA
The coldest temperature ever recorded in San Francisco, CA is 27°F, on December 11, 1932, at the downtown San Francisco station, 1 mile southwest of the town center.
- Records since 1921
- 106 years with enough readings
- A typical year's coldest morning: 38°F
Every year's coldest morning at the downtown San Francisco station
Each point is one year's coldest reading at the downtown San Francisco station, 1921 to 2026.
The five coldest days on record
| Date | Low |
|---|---|
| December 11, 1932 | 27°F |
| December 22, 1990 | 28°F |
| January 8, 1937 | 30°F |
| January 21, 1937 | 30°F |
| December 9, 1972 | 30°F |
Last winter
The coldest morning of last winter (July 2025 to June 2026) was 41°F, on December 13, 2025.
About these records
These are the daily low temperatures NOAA keeps for each station in its Global Historical Climatology Network. Readings NOAA flagged as suspect are left out, and nothing else is removed. A year counts once it has at least 100 days of readings. Temperatures are whole degrees Fahrenheit.
NOAA station record: SAN FRANCISCO DOWNTOWN, CA US
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