Weather in San Juan: January
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Average day temperature: | 80.8°F |
| Average night temperature: | 74.1°F | |
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Sea water temperature: | 80.5°F |
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Number of sunny days: | 8 days |
| Day length: | 11.0 - 11.3 hours | |
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Number of rainy days: | 3 days |
| Precipitation totals: | 42.5 in. | |
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forecast
| San Juan |
temperature
| San Juan |
Air temperature in January, °F
The highest day temperature during January of 2025 was 85°F. At the same time the lowest night temperature was 70°F. Daily and nightly averages during January were 80.8°F and 76.4°F.
Sea water temperature in San Juan in January, °F
The average sea water temperature in January of 2025 was 81.5°F. The highest and lowest sea temperatures during the month were 82.4°F and 80.8°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 Juan in January is 1.5 in. Other months of the year show relatively similar values.
The average wind speed value in January is 11.0 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: 5.8.
Best time for vacation in San Juan
San Juan on a weather map
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