The highest day temperature in January 2026 was 48°F. The lowest night temperature was -7°F. The average values for day and night temperatures during January were 30.8°F и 20.5°F respectivly.

The average sea surface temperature in January 2026 for New Haven was 34.8°F. The maximum and minimum values were 30.6°F and 37.8°F respectively.

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

Precipitation total in January for New Haven is 1.1 in.

The average wind speed in January is 10.4 mph. It makes January the most windy month of the year for New Haven.

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 Haven in January is 5.3 hours.