Weather in San Jose: January
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Average day temperature: | 76.7°F |
| Average night temperature: | 55.9°F | |
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Sea water temperature: | 84.1°F |
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Number of sunny days: | 12 days |
| Day length: | 11.6 - 11.7 hours | |
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Number of rainy days: | 2 days |
| Precipitation totals: | 1.6 in. | |
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| San Jose |
temperature
| San Jose |
Air temperature in January, °F
The highest day temperature during January of 2026 was 80°F. At the same time the lowest night temperature was 50°F. Daily and nightly averages during January were 75.3°F and 54.3°F.
Sea water temperature in San Jose in January, °F
The average sea water temperature in January of 2026 was 84.1°F. The highest and lowest sea temperatures during the month were 84.6°F and 83.5°F.
Mostly all days in January are partly cloudy but sunny or cloudy days are also possible.
Precipitation total in January, in.
Precipitation total value in San Jose in January is 2.0 in. It makes january one of the most dry months of the year.
The average wind speed value in January is 5.8 mph It makes January one of the most 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 January is: 6.2.
Best time for vacation in San Jose
San Jose on a weather map
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