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United States weather

Weather in Long Island, New York for December 2026

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

    Snow Forecast ❄️

  • Long Island typically experiences moderate snowfall in December, with an average of 6 snowy days.

    • Temperatures

  • In general, the average temperature in Long Island at the beginning of December is 4.1 °C. As the month progressed, temperatures tended to slightly increase, reaching an average of 4.4 °C by the end of December.

    • More

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

Average dry days
10
Dry days
Average rainy days
15
Rainy days
Average snowy days
6
Snow days
Average temperatures
4°/-1°
Temperatures
Average wind speed
26 km/h
Avg max wind
Average humidity
78 %
Avg humidity

Long Island Weather December

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

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
 4° /-2° 2.5 mm 0 cm
Dec. 2 Sunny
Sunny
 6° /-1° 68.8 mm 0 cm
Dec. 3 Sunny
Sunny
 3° /0° 0 mm 0 cm
Dec. 4 Overcast
Overcast
 6° /-2° 0.6 mm 0 cm
Dec. 5 Moderate or heavy rain shower
Moderate or heavy rain shower
 4° /-3° 16.6 mm 0 cm
Dec. 6 Cloudy
Cloudy
 2° /-1° 0 mm 0 cm
Dec. 7 Sunny
Sunny
 4° /-1° 0.1 mm 0 cm
Dec. 8 Overcast
Overcast
 5° /-2° 0 mm 0 cm
Dec. 9 Moderate or heavy rain shower
Moderate or heavy rain shower
 6° /-2° 9.2 mm 0 cm
Dec. 10 Overcast
Overcast
 10° /4° 4.1 mm 0 cm
Dec. 11 Moderate or heavy rain shower
Moderate or heavy rain shower
 9° /4° 48.8 mm 0 cm
Dec. 12 Partly cloudy
Partly cloudy
 3° /-2° 5.5 mm 2.3 cm
Dec. 13 Sunny
Sunny
 2° /-3° 0 mm 0 cm
Dec. 14 Sunny
Sunny
 1° /-4° 4.8 mm 2.7 cm
Dec. 15 Overcast
Overcast
 1° /-5° 0 mm 0 cm
Dec. 16 Moderate or heavy rain shower
Moderate or heavy rain shower
 6° /-1° 14.6 mm 0 cm
Dec. 17 Moderate or heavy rain shower
Moderate or heavy rain shower
 9° /3° 12.8 mm 0 cm
Dec. 18 Patchy rain possible
Patchy rain possible
 9° /-1° 2.1 mm 0 cm
Dec. 19 Partly cloudy
Partly cloudy
 10° /1° 38.4 mm 0 cm
Dec. 20 Moderate rain at times
Moderate rain at times
 3° /-1° 1 mm 0 cm
Dec. 21 Patchy moderate snow
Patchy moderate snow
 3° /-3° 1.5 mm 0.9 cm
Dec. 22 Sunny
Sunny
 -1° /-6° 0 mm 0 cm
Dec. 23 Partly cloudy
Partly cloudy
 1° /-5° 9.1 mm 1.4 cm
Dec. 24 Patchy moderate snow
Patchy moderate snow
 4° /0° 0.4 mm 0.2 cm
Dec. 25 Sunny
Sunny
 3° /-2° 2.9 mm 0 cm
Dec. 26 Sunny
Sunny
 -1° /-6° 0 mm 0 cm
Dec. 27 Partly cloudy
Partly cloudy
 2° /-3° 17 mm 12.2 cm
Dec. 28 Moderate or heavy rain shower
Moderate or heavy rain shower
 5° /-2° 11.4 mm 0 cm
Dec. 29 Heavy rain at times
Heavy rain at times
 11° /3° 11 mm 0 cm
Dec. 30 Moderate or heavy rain shower
Moderate or heavy rain shower
 6° /2° 23.7 mm 0 cm
Dec. 31 Overcast
Overcast
 5° /0° 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?

Brace for cold days with temperatures not exceeding 4° and nights that are likely to be freezing. Winter clothing is essential for comfort and safety.

How much rainfall should be expected in Long Island during December?

Significant rainfall exceeding 306.8 mm is expected in Long Island during December, occurring over more than 15 days. Preparing for wet conditions is recommended in your planning.

Will it snow in Long Island in December 2026?

Long Island experiences an average snowfall of 19.79 cm during December, occurring over 6 days.

What are the typical wind conditions in Long Island during December?

The average wind speed in Long Island during December is 26 km/h, suggesting breezy to windy conditions, depending on your activities.

Long Island snow forecast December 2026

Track daily snowfall levels and discover Long Island’s snowy potential this December ❄️
On average, Long Island sees 6 snowy days during December, with approximately 19.8 cm of total snowfall.

December rainfall patterns in Long Island

Explore the daily rainfall trends and prepare for Long Islands December weather 💧
Typically, Long Island has 15 rainy days in December with a total of 306.8 mm of rainfall.

Quick links

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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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