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United States weather

Weather in Suffolk County, New York for January 2026

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

    Official Weather Alert ⚠️

  • Cold Weather Advisory - See hour by hour.

    • Snow Forecast ❄️

  • With an average of 4 snowy days, Suffolk County usually enjoys a light touch of snow in January.
    According to Suffolk County snow forecast for January 2026, no snow is expected until the end of the month.

    • Temperatures

  • Until now, January 2026 in Suffolk County has been nearly identical to the historical average, with a temperature of 2.5 °F (showing only a slight deviation of 0.5 °F).

  • The forecast for the upcoming days in Suffolk County predicts a temperature of -4 °F, which is slightly above the historical average.

  • In general, the average temperature in Suffolk County at the beginning of January is 2.3 °F. As the month progressed, temperatures tended to significantly cool down, reaching an average of -3.1 °F by the end of January.

    • More

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

Average dry days
24
Dry days
Average rainy days
3
Rainy days
Average snowy days
4
Snow days
Average temperatures
2°/-4°
Temperatures
Average wind speed
25 km/h
Avg max wind
Average humidity
67 %
Avg humidity

Suffolk County Weather January

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

Temperatures trend during January in Suffolk County

See the weather trend as well as the moving average line

January weather in Suffolk County day by day

Click on a date for more information
December February
Date Weather Temperatures Rain Snow More
Jan. 1 Patchy rain possible
Patchy rain possible
 5° /0° 12.4 mm 0 cm
Jan. 2 Sunny
Sunny
 3° /-3° 0 mm 0 cm
Jan. 3 Partly cloudy
Partly cloudy
 0° /-4° 0 mm 0 cm
Jan. 4 Cloudy
Cloudy
 1° /-3° 0 mm 0 cm
Jan. 5 Sunny
Sunny
 1° /-5° 0 mm 0 cm
Jan. 6 Patchy moderate snow
Patchy moderate snow
 2° /-1° 0.7 mm 0.2 cm
Jan. 7 Partly cloudy
Partly cloudy
 4° /-2° 0.1 mm 0 cm
Jan. 8 Overcast
Overcast
 4° /-1° 0 mm 0 cm
Jan. 9 Sunny
Sunny
 4° /-4° 0 mm 0 cm
Jan. 10 Sunny
Sunny
 6° /0° 17.3 mm 0 cm
Jan. 11 Moderate snow
Moderate snow
 3° /0° 4.5 mm 1.6 cm
Jan. 12 Sunny
Sunny
 4° /-2° 0 mm 0 cm
Jan. 13 Overcast
Overcast
 5° /0° 0 mm 0 cm
Jan. 14 Cloudy
Cloudy
 3° /1° 0 mm 0 cm
Jan. 15 Sunny
Sunny
 3° /-5° 0 mm 0 cm
Jan. 16 Light freezing rain
Light freezing rain
 0° /-5° 0.2 mm 0 cm
Jan. 17 Sunny
Sunny
 3° /-2° 0 mm 0 cm
Jan. 18 Moderate or heavy rain shower
Moderate or heavy rain shower
 7° /1° 5.3 mm 0 cm
Jan. 19 Light freezing rain
Light freezing rain
 3° /-2° 3.7 mm 2.3 cm
Jan. 20 Cloudy
Cloudy
 -2° /-8° 2.4 mm 1.6 cm
Jan. 21 Light freezing rain
Light freezing rain
 -1° /-10° 0.3 mm 0 cm
Jan. 22 Partly cloudy
Partly cloudy
 -1° /-6° 0 mm 0 cm
Jan. 23 Overcast
Overcast
 0° /-7° 0 mm 0 cm
Jan. 24 Sunny
Sunny
 -4° /-10° 0 mm 0 cm
Jan. 25 Cloudy
Cloudy
 -2° /-9° 46.3 mm 7.9 cm
Jan. 26 Overcast
Overcast
 1° /-5° 11.9 mm 0 cm
Jan. 27 Partly cloudy
Partly cloudy
 0° /-6° 0 mm 0 cm
Jan. 28 Sunny
Sunny
 -4° /-17° 0 mm 0 cm
Jan. 29 Sunny
Sunny
 -3° /-12° 0 mm 0 cm
Jan. 30 Sunny
Sunny
 -7° /-14° 0 mm 0 cm
Jan. 31 Sunny
Sunny
 -7° /-14° 0 mm 0 cm
Next
Important Notice
Our weather forecast for Suffolk County in January 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 January - FAQ

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

Brace for cold days with temperatures not exceeding 2° 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 January?

Moderate rainfall is anticipated in Suffolk County during January, with a total of 65.1 mm spread over approximately 3 days. Considering plans for rainy days is advisable.

Will it snow in Suffolk County in January 2026?

Suffolk County experiences an average snowfall of 10.9 cm during January, occurring over 4 days.

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

The average wind speed in Suffolk County during January is 25 km/h, suggesting breezy to windy conditions, depending on your activities.

Suffolk County snow forecast January 2026

Track daily snowfall levels and discover Suffolk County’s snowy potential this January ❄️
On average, Suffolk County sees 4 snowy days during January, with approximately 10.9 cm of total snowfall.

January rainfall patterns in Suffolk County

Explore the daily rainfall trends and prepare for Suffolk Countys January weather 💧
Typically, Suffolk County has 3 rainy days in January with a total of 65.1 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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