The highest day temperature in January 2025 was 47°F. The lowest night temperature was 9°F. The average values for day and night temperatures during January were 31.7°F и 23.2°F respectivly.

The average sea surface temperature in January 2025 for New Haven was 36.1°F. The maximum and minimum values were 33.0°F and 40.2°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 1.2 in. It makes january one of the least rainy months of the year.

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 5.1 hours.