Dangerous Cold Persists through Monday; Wintry Weather from the Northern Plains to the Great Lakes

Bitter cold temperatures and dangerous wind chills will persist from Florida to the Northeast through Monday. Daily record low temperatures are forecast across the Southeast and Florida, with some all-time February low temperature records possible across Florida. An Alberta clipper will spread wintry precipitation across the Northern Plains today and into the upper Great Lakes into tonight. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

Mostly Cloudy and Breezy

19°F

-7°C

Humidity 47%
Wind Speed N 24 G 33 mph
Barometer 29.72 in (1006.4 mb)
Dewpoint 2°F (-17°C)
Visibility 10.00 mi
Wind Chill2°F (-17°C)
Last update 1 Feb 3:56 pm EST
Extended Forecast for

2 Miles NNW Stony Brook NY

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 14. Wind chill values between zero and 5. Northwest wind 14 to 18 mph, with gusts as high as 28 mph.

    Low: 14 °F

    Decreasing
    Clouds

  • Monday

    Monday: Sunny, with a high near 30. Wind chill values between zero and 10. Northwest wind 11 to 14 mph.

    High: 30 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 16. Northwest wind around 6 mph.

    Low: 16 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 31. Wind chill values between 15 and 25. West wind 3 to 7 mph.

    High: 31 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 21. West wind 3 to 6 mph.

    Low: 21 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 31.

    High: 31 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 15.

    Low: 15 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 29.

    High: 29 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 15.

    Low: 15 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 14. Wind chill values between zero and 5. Northwest wind 14 to 18 mph, with gusts as high as 28 mph.
Monday
Sunny, with a high near 30. Wind chill values between zero and 10. Northwest wind 11 to 14 mph.
Monday Night
Mostly clear, with a low around 16. Northwest wind around 6 mph.
Tuesday
Sunny, with a high near 31. Wind chill values between 15 and 25. West wind 3 to 7 mph.
Tuesday Night
Mostly cloudy, with a low around 21. West wind 3 to 6 mph.
Wednesday
Partly sunny, with a high near 31.
Wednesday Night
Partly cloudy, with a low around 15.
Thursday
Mostly sunny, with a high near 29.
Thursday Night
Partly cloudy, with a low around 15.
Friday
A 30 percent chance of snow after 1pm. Mostly cloudy, with a high near 31.
Friday Night
A 30 percent chance of snow. Mostly cloudy, with a low around 13.
Saturday
Mostly sunny, with a high near 21. Blustery.
Saturday Night
Partly cloudy, with a low around 6. Blustery.
Sunday
Mostly sunny and cold, with a high near 19.
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ABOUT THIS FORECAST

 
Point Forecast:
2 Miles NNW Stony Brook NY
 40.92°N 73.15°W (Elev. 36 ft)
1:01 pm EST Feb 1, 2026
4pm EST Feb 1, 2026-6pm EST Feb 8, 2026
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database