The highest day temperature in January 2025 was 46°F. The lowest night temperature was 13°F. The average values for day and night temperatures during January were 32.6°F и 26.2°F respectivly.

The average sea surface temperature in January 2025 for Stonington was 40.6°F. The maximum and minimum values were 37.4°F and 44.4°F respectively.

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

Precipitation total in January for Stonington is 1.2 in. This value is relatively stable throughout the year.

The average wind speed in January is 10.1 mph. It makes January the most windy month of the year for Stonington.

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 Stonington in January is 5.0 hours.