Suffolk County (Long Island)
December
Weather in Suffolk County for December 2025
Your guide to Suffolk County weather in December - trends and predictions
With an average of 3 snowy days, Suffolk County usually enjoys a light touch of snow in December.
In general, the average temperature in Suffolk County 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.
The climate of Suffolk County in December is notably wet, with an average of 13 rainy days, and a total of 301.2 mm of precipitation.
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Snow Forecast ❄️
Temperatures
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15
Dry days
13
Rainy days
3
Snow days
6°/0°
Temperatures
22 km/h
Avg max wind
80 %
Avg humidity
Suffolk County Weather December
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Temperatures trend during December in Suffolk County
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December weather in Suffolk County day by day
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| Date | Weather | Temperatures | Rain | Snow | More |
|---|---|---|---|---|---|
| Dec. 1 |  Overcast | 2° /-3° | 0 mm | 0 cm | |
| Dec. 2 |  Sunny | 2° /-1° | 0 mm | 0 cm | |
| Dec. 3 | Sunny | 3° /0° | 0 mm | 0 cm | |
| Dec. 4 | Overcast | 6° /-1° | 1.3 mm | 0 cm | |
| Dec. 5 |  Moderate or heavy rain shower | 6° /0° | 33.2 mm | 0 cm | |
| Dec. 6 |  Cloudy | 1° /-1° | 0 mm | 0 cm | |
| Dec. 7 | Sunny | 4° /-2° | 0.1 mm | 0 cm | |
| Dec. 8 | Overcast | 9° /2° | 0 mm | 0 cm | |
| Dec. 9 | Moderate or heavy rain shower | 10° /2° | 18.4 mm | 0 cm | |
| Dec. 10 | Overcast | 12° /7° | 1.3 mm | 0 cm | |
| Dec. 11 | Moderate or heavy rain shower | 14° /9° | 95.7 mm | 0 cm | |
| Dec. 12 |  Partly cloudy | 6° /-1° | 11 mm | 4.5 cm | |
| Dec. 13 | Sunny | 1° /-3° | 0 mm | 0 cm | |
| Dec. 14 | Sunny | 0° /-4° | 0 mm | 0 cm | |
| Dec. 15 | Overcast | 3° /-3° | 0 mm | 0 cm | |
| Dec. 16 | Moderate or heavy rain shower | 11° /3° | 29.3 mm | 0 cm | |
| Dec. 17 | Moderate or heavy rain shower | 13° /7° | 25.7 mm | 0 cm | |
| Dec. 18 |  Patchy rain possible | 9° /1° | 4.2 mm | 0 cm | |
| Dec. 19 | Partly cloudy | 8° /1° | 2.1 mm | 0 cm | |
| Dec. 20 | Moderate rain at times | 4° /0° | 2 mm | 0 cm | |
| Dec. 21 |  Patchy moderate snow | 1° /-4° | 3 mm | 1.9 cm | |
| Dec. 22 | Sunny | -5° /-8° | 0 mm | 0 cm | |
| Dec. 23 | Partly cloudy | -1° /-9° | 0 mm | 0 cm | |
| Dec. 24 | Patchy moderate snow | 1° /0° | 0.9 mm | 0.4 cm | |
| Dec. 25 | Sunny | 2° /-3° | 0 mm | 0 cm | |
| Dec. 26 | Sunny | 1° /-3° | 0 mm | 0 cm | |
| Dec. 27 | Partly cloudy | 4° /-3° | 0 mm | 0 cm | |
| Dec. 28 | Moderate or heavy rain shower | 9° /1° | 22.7 mm | 0 cm | |
| Dec. 29 |  Heavy rain at times | 12° /7° | 2.9 mm | 0 cm | |
| Dec. 30 | Moderate or heavy rain shower | 12° /6° | 47.4 mm | 0 cm | |
| Dec. 31 | Overcast | 10° /4° | 0 mm | 0 cm | |
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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?
Prepare for cooler days with highs just around 6° and colder nights, dipping below 0°.
How much rainfall should be expected in Suffolk County during December?
Significant rainfall exceeding 301.2 mm is expected in Suffolk County during December, occurring over more than 13 days. Preparing for wet conditions is recommended in your planning.
Will it snow in Suffolk County in December 2025?
Suffolk County experiences an average snowfall of 6.8 cm during December, occurring over 3 days.
What are the typical wind conditions in Suffolk County during December?
The average wind speed in Suffolk County during December is 22 km/h, suggesting breezy to windy conditions, depending on your activities.
Suffolk County snow forecast December 2025
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December rainfall patterns in Suffolk County
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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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