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United States weather

Weather in Suffolk County, New York for December 2026

Your guide to Suffolk County weather in December - trends and predictions

    Snow Forecast ❄️

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

    • Temperatures

  • In general, the average temperature in Suffolk County 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

Suffolk County 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 Suffolk County

See the weather trend as well as the moving average line

December weather in Suffolk County 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 Suffolk 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 Suffolk County forecast closer to your planned date for the most up-to-date weather information.
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Suffolk County in December - FAQ

What are the expected maximum and minimum temperatures in Suffolk County 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 Suffolk County during December?

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

Will it snow in Suffolk County in December 2026?

Suffolk County experiences an average snowfall of 19.79 cm during December, occurring over 6 days.

What are the typical wind conditions in Suffolk County during December?

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

Suffolk County snow forecast December 2026

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

December rainfall patterns in Suffolk County

Explore the daily rainfall trends and prepare for Suffolk Countys December weather 💧
Typically, Suffolk County has 15 rainy days in December with a total of 306.8 mm of rainfall.
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Location coordinates Where is Suffolk County?

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

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