Weather in San Francisco: December
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Average day temperature: | 54.2°F |
| Average night temperature: | 50.2°F | |
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Sea water temperature: | 54.0°F |
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Number of sunny days: | 13 days |
| Day length: | 9.5 - 9.7 hours | |
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Number of rainy days: | 4 days |
| Precipitation totals: | 2.0 in. | |
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| San Francisco |
Air temperature in December, °F
| Day temperature | Night temperature |
The highest day temperature during December of 2024 was 60°F. At the same time the lowest night temperature was 44°F. Daily and nightly averages during December were 54.0°F and 51.3°F.
Sea water temperature in San Francisco in December, °F
The average sea water temperature in December of 2024 was 53.6°F. The highest and lowest sea temperatures during the month were 54.7°F and 52.0°F.
| Sunny days | |
| Partly cloudy days | |
| Cloudy days |
Number of sunny, partly cloudy and cloudy days in December is almost equal.
Precipitation total in December, in.
Precipitation total value in San Francisco in December is 1.6 in. Other months of the year show relatively similar values.
The average wind speed value in December is 7.7 mph It makes December one of the least windy months of the year.
This chart shows average number of hours during the day when sunlight can reach the ground. It depends on day length and cloudiness during the day. The average number of sunny hours in December is: 4.3.
Best time for vacation in San Francisco
San Francisco on a weather map
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