Weather in San Francisco: January
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Average day temperature: | 54.6°F |
| Average night temperature: | 49.8°F | |
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Sea water temperature: | 52.4°F |
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Number of sunny days: | 15 days |
| Day length: | 9.6 - 10.3 hours | |
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Number of rainy days: | 4 days |
| Precipitation totals: | 2.2 in. | |
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forecast
| San Francisco |
temperature
| San Francisco |
Air temperature in January, °F
The highest day temperature during January of 2025 was 59°F. At the same time the lowest night temperature was 42°F. Daily and nightly averages during January were 52.9°F and 48.8°F.
Sea water temperature in San Francisco in January, °F
The average sea water temperature in January of 2025 was 52.7°F. The highest and lowest sea temperatures during the month were 53.4°F and 51.8°F.
Mostly all days in January are cloudy but sunny and partly cloudy days are also possible.
Precipitation total in January, in.
Precipitation total value in San Francisco in January is 2.8 in. Other months of the year show relatively similar values.
The average wind speed value in January is 7.8 mph
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 January is: 5.9.
Best time for vacation in San Francisco
San Francisco on a weather map
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