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Weather in New Haven County, Connecticut for December 2025

Your guide to New Haven County weather in December - trends and predictions

    Snow Forecast ❄️

  • With an average of 2 snowy days, New Haven County usually enjoys a light touch of snow in December.
    According to New Haven County snow forecast for December 2025, 2 snowy days are expected until the end of the month. The closest date with snow is Thursday, December 25.

    • Temperatures

  • Until now, December 2025 in New Haven County is slightly cooler than the historical average by -1.7 °F.

  • The forecast for the next days in New Haven County predicts temperatures to be around 4 °F, close to the historical average.

  • In general, the average temperature in New Haven County at the beginning of December is 3.3 °F. As the month progressed, temperatures tended to moderately rise, reaching an average of 4.1 °F by the end of December.

    • Rain 🌧️

  • The climate of New Haven County in December is notably wet, with an average of 13 rainy days, and a total of 274.2 mm of precipitation.

    • More

  • New! Chat with our AI weatherman - it’s amazing and free.

Average dry days
16
Dry days
Average rainy days
13
Rainy days
Average snowy days
2
Snow days
Average temperatures
5°/-1°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
76 %
Avg humidity

New Haven County Weather December

Move between months or click on a day
November
January
Sun.Mon.Tue.Wed.Thu.Fri.Sat.
1
Overcast
4°
2
Sunny
5°
3
Partly cloudy
4°
4
Overcast
4°
5
Moderate or heavy rain shower
2°
6
Overcast
1°
7
Partly cloudy
3°
8
Overcast
5°
9
Moderate or heavy rain shower
5°
10
Patchy rain possible
8°
11
Moderate or heavy rain shower
8°
12
Cloudy
4°
13
Sunny
1°
14
Sunny
0°
15
Overcast
0°
16
Moderate or heavy rain shower
9°
17
Sunny
4°
18
Mist
6°
19
Heavy rain
12°
20
Partly cloudy
3°
21
Cloudy
7°
22
Sunny
-1°
23
Patchy moderate snow
0°
24
Overcast
5°
25
Heavy snow
2°
26
Moderate rain
4°
27
Patchy rain possible
7°
28
Patchy rain possible
8°
29
Partly cloudy
0°
30
Light freezing rain
1°
31
Fog
7°

Temperatures trend during December in New Haven County

See the weather trend as well as the moving average line

December weather in New Haven County day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
Dec. 1 Overcast
Overcast
 4° /-1° 1.7 mm 0 cm
Dec. 2 Sunny
Sunny
 5° /-1° 66.6 mm 0 cm
Dec. 3 Partly cloudy
Partly cloudy
 4° /-2° 0 mm 0 cm
Dec. 4 Overcast
Overcast
 4° /-2° 0.6 mm 0 cm
Dec. 5 Moderate or heavy rain shower
Moderate or heavy rain shower
 2° /-4° 15.4 mm 0 cm
Dec. 6 Overcast
Overcast
 1° /-2° 0 mm 0 cm
Dec. 7 Partly cloudy
Partly cloudy
 3° /-1° 0.1 mm 0 cm
Dec. 8 Overcast
Overcast
 5° /-2° 0.2 mm 0 cm
Dec. 9 Moderate or heavy rain shower
Moderate or heavy rain shower
 5° /-3° 9.2 mm 0 cm
Dec. 10 Patchy rain possible
Patchy rain possible
 8° /2° 6.2 mm 0 cm
Dec. 11 Moderate or heavy rain shower
Moderate or heavy rain shower
 8° /3° 38.8 mm 0 cm
Dec. 12 Cloudy
Cloudy
 4° /-3° 4.8 mm 2 cm
Dec. 13 Sunny
Sunny
 1° /-3° 0 mm 0 cm
Dec. 14 Sunny
Sunny
 0° /-4° 0 mm 0 cm
Dec. 15 Overcast
Overcast
 0° /-6° 0 mm 0 cm
Dec. 16 Moderate or heavy rain shower
Moderate or heavy rain shower
 9° /3° 24.9 mm 0 cm
Dec. 17 Sunny
Sunny
 4° /-1° 0 mm 0 cm
Dec. 18 Mist
Mist
 6° /-3° 0 mm 0 cm
Dec. 19 Heavy rain
Heavy rain
 12° /3° 95.4 mm 0 cm
Dec. 20 Partly cloudy
Partly cloudy
 3° /-2° 0 mm 0 cm
Dec. 21 Cloudy
Cloudy
 7° /-1° 0.1 mm 0 cm
Dec. 22 Sunny
Sunny
 -1° /-4° 0 mm 0 cm
Dec. 23 Patchy moderate snow
Patchy moderate snow
 0° /-5° 0.9 mm 0 cm
Dec. 24 Overcast
Overcast
 5° /-1° 0 mm 0 cm
Dec. 25 Heavy snow
Heavy snow
 2° /-1° 0.4 mm 0.2 cm
Dec. 26 Moderate rain
Moderate rain
 4° /2° 5.5 mm 0 cm
Dec. 27 Patchy rain possible
Patchy rain possible
 7° /4° 1.9 mm 0 cm
Dec. 28 Patchy rain possible
Patchy rain possible
 8° /1° 2.9 mm 0 cm
Dec. 29 Partly cloudy
Partly cloudy
 0° /-3° 0 mm 0 cm
Dec. 30 Light freezing rain
Light freezing rain
 1° /-3° 0.4 mm 0.3 cm
Dec. 31 Fog
Fog
 7° /2° 0 mm 0 cm
Next
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 13 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 4.34 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 ❄️
On average, New Haven County sees 2 snowy days during December, with approximately 4.3 cm of total snowfall.

December rainfall patterns in New Haven County

Explore the daily rainfall trends and prepare for New Haven Countys December weather 💧
Typically, New Haven County has 13 rainy days in December with a total of 274.2 mm of rainfall.
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Location coordinates Where is New Haven County?

Get accurate weather forecasts for New Haven County, located at latitude 41.308 and longitude -72.928. Stay updated with localized weather information tailored for New Haven County.

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