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Weather in Long Island for December 2025

Your guide to Long Island weather in December - trends and predictions

    Snow Forecast ❄️

  • With an average of 3 snowy days, Long Island usually enjoys a light touch of snow in December.

    • Temperatures

  • In general, the average temperature in Long Island at the beginning of December is 3.4 °F. As the month progressed, temperatures tended to significantly warm up, reaching an average of 7.1 °F by the end of December.

    • Rain 🌧️

  • The climate of Long Island in December is notably wet, with an average of 13 rainy days, and a total of 301.2 mm of precipitation.

    • More

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

Average dry days
15
Dry days
Average rainy days
13
Rainy days
Average snowy days
3
Snow days
Average temperatures
6°/0°
Temperatures
Average wind speed
22 km/h
Avg max wind
Average humidity
80 %
Avg humidity

Long Island Weather December

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

Temperatures trend during December in Long Island

See the weather trend as well as the moving average line

December weather in Long Island day by day

Click on a date for more information
November January
Date Weather Temperatures Rain Snow More
Dec. 1 Overcast
Overcast
 2° /-3° 0 mm 0 cm
Dec. 2 Sunny
Sunny
 2° /-1° 0 mm 0 cm
Dec. 3 Sunny
Sunny
 3° /0° 0 mm 0 cm
Dec. 4 Overcast
Overcast
 6° /-1° 1.3 mm 0 cm
Dec. 5 Moderate or heavy rain shower
Moderate or heavy rain shower
 6° /0° 33.2 mm 0 cm
Dec. 6 Cloudy
Cloudy
 1° /-1° 0 mm 0 cm
Dec. 7 Sunny
Sunny
 4° /-2° 0.1 mm 0 cm
Dec. 8 Overcast
Overcast
 9° /2° 0 mm 0 cm
Dec. 9 Moderate or heavy rain shower
Moderate or heavy rain shower
 10° /2° 18.4 mm 0 cm
Dec. 10 Overcast
Overcast
 12° /7° 1.3 mm 0 cm
Dec. 11 Moderate or heavy rain shower
Moderate or heavy rain shower
 14° /9° 95.7 mm 0 cm
Dec. 12 Partly cloudy
Partly cloudy
 6° /-1° 11 mm 4.5 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
 3° /-3° 0 mm 0 cm
Dec. 16 Moderate or heavy rain shower
Moderate or heavy rain shower
 11° /3° 29.3 mm 0 cm
Dec. 17 Moderate or heavy rain shower
Moderate or heavy rain shower
 13° /7° 25.7 mm 0 cm
Dec. 18 Patchy rain possible
Patchy rain possible
 9° /1° 4.2 mm 0 cm
Dec. 19 Partly cloudy
Partly cloudy
 8° /1° 2.1 mm 0 cm
Dec. 20 Moderate rain at times
Moderate rain at times
 4° /0° 2 mm 0 cm
Dec. 21 Patchy moderate snow
Patchy moderate snow
 1° /-4° 3 mm 1.9 cm
Dec. 22 Sunny
Sunny
 -5° /-8° 0 mm 0 cm
Dec. 23 Partly cloudy
Partly cloudy
 -1° /-9° 0 mm 0 cm
Dec. 24 Patchy moderate snow
Patchy moderate snow
 1° /0° 0.9 mm 0.4 cm
Dec. 25 Sunny
Sunny
 2° /-3° 0 mm 0 cm
Dec. 26 Sunny
Sunny
 1° /-3° 0 mm 0 cm
Dec. 27 Partly cloudy
Partly cloudy
 4° /-3° 0 mm 0 cm
Dec. 28 Moderate or heavy rain shower
Moderate or heavy rain shower
 9° /1° 22.7 mm 0 cm
Dec. 29 Heavy rain at times
Heavy rain at times
 12° /7° 2.9 mm 0 cm
Dec. 30 Moderate or heavy rain shower
Moderate or heavy rain shower
 12° /6° 47.4 mm 0 cm
Dec. 31 Overcast
Overcast
 10° /4° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Long Island 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 Long Island forecast closer to your planned date for the most up-to-date weather information.
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Long Island in December - FAQ

What are the expected maximum and minimum temperatures in Long Island during December?
Prepare for cooler days with highs just around 6° and colder nights, dipping below 0°.
How much rainfall should be expected in Long Island during December?
Significant rainfall exceeding 301.2 mm is expected in Long Island during December, occurring over more than 13 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Long Island in December 2025?
Long Island experiences an average snowfall of 6.8 cm during December, occurring over 3 days.
What are the typical wind conditions in Long Island during December?
The average wind speed in Long Island during December is 22 km/h, suggesting breezy to windy conditions, depending on your activities.

Long Island snow forecast December 2025

Track daily snowfall levels and discover Long Island’s snowy potential this December ❄️

December rainfall patterns in Long Island

Explore the daily rainfall trends and prepare for Long Islands December weather 💧

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Location coordinates Where is Long Island?

Get accurate weather forecasts for Long Island, located at latitude 40.817 and longitude -73.066. Stay updated with localized weather information tailored for Long Island.

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