The highest day temperature in December 2023 was 56°F. The lowest night temperature was 23°F. The average values for day and night temperatures during December were 43.6°F и 37.9°F respectivly.

The average sea surface temperature in December 2023 for New Haven was 46.3°F. The maximum and minimum values were 43.8°F and 50.0°F respectively.

Most of the days in December are gloomy but you can also expect sunny days.

Precipitation total in December for New Haven is 2.1 in. It makes december the most rainy month of the year.

The average wind speed in December is 10.1 mph. It makes December one of the most windy months 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 December is 4.6 hours.