New Haven Weather: December
 |
Average Day Temperature: | 39.4°F |
|
Average Night Temperature: | 33.3°F |
|
Sea Water Temperature: | 45.3°F |
|
Number of Sunny Days: | 13 days |
| Sunshine Hours: | 9.2 - 9.4 hours | |
|
Number of Rainy Days: | 3 days |
| Precipitation Totals: | 1.6 in | |
| detailed information | ||
forecast
| New Haven |
Temperature
| New Haven |
Air Temperature in December, °F
The highest day temperature in December 2025 was 54°F. The lowest night temperature was 9°F. The average values for day and night temperatures during December were 34.8°F и 25.9°F respectivly.
New Haven Water Sea Temperature in December, °F
The average sea surface temperature in December 2025 for New Haven was 42.8°F. The maximum and minimum values were 37.8°F and 48.8°F respectively.
Most of the days in December are sunny but you can also expect cloudy and gloomy days.
Precipitation Totals in December, in
Precipitation total in December for New Haven is 1.6 in. It makes december the most rainy month of the year.
The average wind speed in December is 10.2 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 5.1 hours.
New Haven on the Weather Map
| Boston |  |
+94 |
| Chicago | |
+88 |
| Hawaii |  |
+80 |
| Houston |  |
+90 |
| Las Vegas | |
+120 |
| Los Angeles | |
+106 |
| Maui |  |
+76 |
| Miami | |
+100 |
| Myrtle Beach | |
+96 |
| New York | |
+114 |
| San Diego | |
+96 |
| San Francisco | |
+76 |
| Santa Monica | |
+84 |
| Sarasota | |
+102 |
| Tampa | |
+100 |
| 1500 |  |
98°F | E 12 mph |
| 1800 | |
92°F | SE 8 mph |
| 2100 |  |
84°F | SE 8 mph |
| 0000 | |
78°F | SE 6 mph |
| 0300 | |
76°F | E 2 mph |
| 0600 |  |
74°F | SE 2 mph |
| 0900 | |
82°F | SE 2 mph |
| 1200 | |
88°F | E 2 mph |