The highest day temperature in May 2025 was 76°F. The lowest night temperature was 42°F. The average values for day and night temperatures during May were 65.5°F и 53.0°F respectivly.

The average sea surface temperature in May 2025 for New London was 52.6°F. The maximum and minimum values were 47.8°F and 56.2°F respectively.

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

Precipitation total in May for New London is 1.2 in. This value is relatively stable throughout the year.

The average wind speed in May is 8.3 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 New London in May is 7.2 hours.