The highest day temperature in March 2025 was 46°F. The lowest night temperature was 17°F. The average values for day and night temperatures during March were 41.1°F и 38.4°F respectivly.

The average sea surface temperature in March 2025 for Charlestown was 39.7°F. The maximum and minimum values were 37.4°F and 43.2°F respectively.

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

Precipitation total in March for Charlestown is 1.3 in. It makes march one of the most rainy months of the year.

The average wind speed in March is 13.0 mph. It makes March one of the most windy months of the year for Charlestown.

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 Charlestown in March is 6.1 hours.