New Haven County (New Haven)
December
Weather in New Haven County, Connecticut for December 2025
Your guide to New Haven County weather in December - trends and predictions
With an average of 2 snowy days, New Haven County usually enjoys a light touch of snow in December.
In general, the average temperature in New Haven County at the beginning of December is 3.4 °F. As the month progressed, temperatures tended to noticeably warm up, reaching an average of 5.9 °F by the end of December.
The climate of New Haven County in December is notably wet, with an average of 15 rainy days, and a total of 274.2 mm of precipitation.
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Snow Forecast ❄️
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14
Dry days
15
Rainy days
2
Snow days
5°/-1°
Temperatures
22 km/h
Avg max wind
77 %
Avg humidity
New Haven County Weather December
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Temperatures trend during December in New Haven County
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December weather in New Haven County day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 |  Overcast | 2° /-1° | 0 mm | 0 cm | |
| Dec. 2 |  Sunny | 4° /-2° | 0 mm | 0 cm | |
| Dec. 3 |  Partly cloudy | 5° /-2° | 0 mm | 0 cm | |
| Dec. 4 | Overcast | 4° /-1° | 1.3 mm | 0 cm | |
| Dec. 5 |  Moderate or heavy rain shower | 4° /0° | 30.9 mm | 0 cm | |
| Dec. 6 | Overcast | 1° /-2° | 0 mm | 0 cm | |
| Dec. 7 | Partly cloudy | 4° /-2° | 0.1 mm | 0 cm | |
| Dec. 8 | Overcast | 8° /1° | 0.5 mm | 0 cm | |
| Dec. 9 | Moderate or heavy rain shower | 8° /1° | 18.5 mm | 0 cm | |
| Dec. 10 |  Patchy rain possible | 10° /5° | 2.8 mm | 0 cm | |
| Dec. 11 | Moderate or heavy rain shower | 14° /8° | 73.9 mm | 0 cm | |
| Dec. 12 |  Cloudy | 7° /-1° | 9.5 mm | 3.9 cm | |
| Dec. 13 | Sunny | 1° /-3° | 0 mm | 0 cm | |
| Dec. 14 | Sunny | 0° /-4° | 0 mm | 0 cm | |
| Dec. 15 | Overcast | 1° /-4° | 0 mm | 0 cm | |
| Dec. 16 | Moderate or heavy rain shower | 9° /3° | 24.9 mm | 0 cm | |
| Dec. 17 | Moderate or heavy rain shower | 12° /6° | 23.4 mm | 0 cm | |
| Dec. 18 | Overcast | 7° /2° | 6.8 mm | 0 cm | |
| Dec. 19 | Overcast | 7° /1° | 2.9 mm | 0 cm | |
| Dec. 20 | Patchy rain possible | 2° /0° | 0.4 mm | 0 cm | |
| Dec. 21 |  Light freezing rain | 0° /-5° | 1.1 mm | 0 cm | |
| Dec. 22 | Sunny | -5° /-10° | 0 mm | 0 cm | |
| Dec. 23 | Partly cloudy | -2° /-10° | 0 mm | 0 cm | |
| Dec. 24 |  Patchy moderate snow | 2° /-1° | 0.9 mm | 0.4 cm | |
| Dec. 25 | Sunny | 2° /-5° | 0 mm | 0 cm | |
| Dec. 26 | Sunny | 1° /-5° | 0 mm | 0 cm | |
| Dec. 27 | Cloudy | 1° /-6° | 0 mm | 0 cm | |
| Dec. 28 | Moderate or heavy rain shower | 7° /1° | 21.4 mm | 0 cm | |
| Dec. 29 |  Heavy rain at times | 11° /5° | 2.3 mm | 0 cm | |
| Dec. 30 | Moderate or heavy rain shower | 12° /6° | 52.6 mm | 0 cm | |
| Dec. 31 |  Fog | 7° /2° | 0 mm | 0 cm | |
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Important Notice
Our weather forecast for New Haven County in December is based on the analysis of historical data rather than real-time forecast models. While this provides a general overview, weather conditions can change. We recommend that you check the New Haven County forecast closer to your planned date for the most up-to-date weather information.
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New Haven County in December - FAQ
What are the expected maximum and minimum temperatures in New Haven County during December?
Brace for cold days with temperatures not exceeding 5° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.
How much rainfall should be expected in New Haven County during December?
Significant rainfall exceeding 274.2 mm is expected in New Haven County during December, occurring over more than 15 days. Preparing for wet conditions is recommended in your planning.
Will it snow in New Haven County in December 2025?
New Haven County experiences an average snowfall of 4.3 cm during December, occurring over 2 days.
What are the typical wind conditions in New Haven County during December?
The average wind speed in New Haven County during December is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
New Haven County snow forecast December 2025
Track daily snowfall levels and discover New Haven County’s snowy potential this December ❄️
December rainfall patterns in New Haven County
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