San Francisco, CA All-Time Weather Extremes
The most extreme temperature, precipitation, and snowfall ever recorded in San Francisco, from NOAA daily weather observations.
| Temperature | ||
|---|---|---|
| Record High | 105.9°F (41°C) | September 1, 2017 |
| Record Low | 26.9°F (-3°C) | December 11, 1932 |
| Lowest High | 35°F (2°C) | December 11, 1932 |
| Highest Low | 75°F (24°C) | September 2, 2017 |
| Highest Mean | 88.5°F (31°C) | September 2, 2017 |
| Lowest Mean | 30.9°F (-1°C) | December 11, 1932 |
| Precipitation | ||
| Max in One Calendar Day | 5.54" (140.7 mm) | November 5, 1994 |
| Max in One Month | 14.89" (378.2 mm) | February 1998 |
| Least in One Month | 0.00" (0.0 mm) | July 1921 |
| Max in One Year | 43.78" (1112.0 mm) | 1983 |
| Least in One Year | 5.60" (142.3 mm) | 2013 |
| Snowfall | ||
| Max in One Calendar Day | 0.8" (2.0 cm) | December 11, 1932 |
| Max in One Month | 0.8" (2.0 cm) | December 1932 |
| Max in One Season | 0.8" (2.0 cm) | 1932-33 |
| Max in One Year | 0.8" (2.0 cm) | 1932 |
| Earliest Snow | 0.8" (2.0 cm) | December 11, 1932 |
| Earliest Measurable Snow | 0.8" (2.0 cm) | December 11, 1932 |
| Latest Snow | 0.3" (0.8 cm) | January 15, 1952 |
| Latest Measurable Snow | 0.3" (0.8 cm) | January 15, 1952 |
| Period of Record | ||
| Temperature | January 1, 1921 – February 6, 2025 | |
| Precipitation | January 1, 1921 – February 6, 2025 | |
| Snowfall | January 1, 1921 – February 29, 2020 | |
Note: Records compiled from NOAA GHCN-Daily observations at SAN FRANCISCO DWTN. Quality-flagged readings are excluded. Monthly and annual totals require substantially complete reporting for “least” records.
Shareable Image Version
Frequently Asked Questions
What is the hottest temperature ever recorded in San Francisco, CA?
The all-time record high in San Francisco, CA is 105.9°F (41°C), set on September 1, 2017.
What is the coldest temperature ever recorded in San Francisco, CA?
The all-time record low in San Francisco, CA is 26.9°F (-3°C), set on December 11, 1932.
What is the most rain San Francisco, CA has ever had in one day?
The most precipitation recorded in one calendar day near San Francisco, CA is 5.54 inches, on November 5, 1994.
What is the biggest snowfall ever recorded in San Francisco, CA?
The most snow recorded in one calendar day near San Francisco, CA is 0.8 inches, on December 11, 1932.
Look Up Extremes by ZIP Code
See the all-time weather extremes for any US location
San Francisco Weather History
Monthly averages, records, and climate data for San Francisco
California Weather Extremes
Statewide records and extremes for other California cities