Frost dates · California
Does it ever freeze in San Francisco?
San Francisco gets a freeze in about one year in ten, on fewer than one night a year on average.
In the years it does freeze, the first night tends to come around December 26 and the last around December 29.
Last updated
A weather alert is in force here, so no joke today. The National Weather Service has the details.
Live 48-hour check from OpenWeatherMap, refreshed about every half hour. Alerts from the National Weather Service.
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A frost date here is a night when the official thermometer reads 32°F or colder. Frost on the ground can show up on clear, calm nights a few degrees milder.
Other cities where it hardly ever freezes
- Honolulu, Hawaii: freezes on fewer than one night a year
- Los Angeles, California: freezes on fewer than one night a year
- Miami, Florida: freezes on fewer than one night a year
Source: NOAA U.S. Climate Normals, 1991 to 2020, station USW00023234.