The highest day temperature in April 2026 was 55°F. The lowest night temperature was 33°F. The average values for day and night temperatures during April were 46.9°F и 43.5°F respectivly.

The average sea surface temperature in April 2026 for Charlestown was 42.2°F. The maximum and minimum values were 37.8°F and 47.0°F respectively.

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

Precipitation total in April for Charlestown is 1.2 in.

The average wind speed in April is 12.1 mph.

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 April is 6.7 hours.