The highest day temperature in January 2025 was 46°F. The lowest night temperature was 17°F. The average values for day and night temperatures during January were 33.3°F и 30.8°F respectivly.

The average sea surface temperature in January 2025 for Block Island was 42.4°F. The maximum and minimum values were 40.0°F and 46.8°F respectively.

You can expect various weather conditions during January. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in January for Block Island is 1.3 in. This value is relatively stable throughout the year.

The average wind speed in January is 15.6 mph. It makes January the most windy month of the year for Block Island.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Block Island in January is 4.9 hours.