The highest day temperature in December 2024 was 56°F. The lowest night temperature was 19°F. The average values for day and night temperatures during December were 40.5°F и 38.5°F respectivly.

The average sea surface temperature in December 2024 for Block Island was 49.4°F. The maximum and minimum values were 45.4°F and 54.6°F respectively.

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

Precipitation total in December for Block Island is 1.4 in. This value is relatively stable throughout the year.

The average wind speed in December is 15.3 mph. It makes December one of the most windy months 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 December is 4.8 hours.