The highest day temperature in May 2023 was 69°F. The lowest night temperature was 46°F. The average values for day and night temperatures during May were 60.7°F и 54.2°F respectivly.

The average sea surface temperature in May 2023 for Block Island was 53.2°F. The maximum and minimum values were 48.0°F and 58.2°F respectively.

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

Precipitation total in May for Block Island is 1.4 in.

The average wind speed in May is 12.2 mph. It makes May one of the most windless 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 May is 8.2 hours.