Weather in Block Island: January
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Average day temperature: | 36.8°F |
| Average night temperature: | 34.1°F | |
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Sea water temperature: | 44.1°F |
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Number of sunny days: | 11 days |
| Day length: | 9.3 - 10.1 hours | |
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Number of rainy days: | 3 days |
| Precipitation totals: | 1.2 in. | |
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forecast
| Block Island |
temperature
| Block Island |
Air temperature in January, °F
The highest day temperature during January of 2026 was 49°F. At the same time the lowest night temperature was 11°F. Daily and nightly averages during January were 33.2°F and 29.5°F.
Sea water temperature in Block Island in January, °F
The average sea water temperature in January of 2026 was 40.7°F. The highest and lowest sea temperatures during the month were 42.4°F and 38.3°F.
Number of sunny, partly cloudy and cloudy days in January is almost equal.
Precipitation total in January, in.
Precipitation total value in Block Island in January is 1.2 in. Other months of the year show relatively similar values.
The average wind speed value in January is 16.0 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: 5.1.
Best time for vacation in Block Island
Block Island on a weather map
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