National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Heavy Snow in the Central/Southern Rockies; Below Average Temperatures in the Central and Eastern US

Moderate to heavy snowfall is expected in the central/southern Rockies and adjacent High Plains today. Lake-enhanced snowfall is expected downwind of the Great Lakes today. Showers and thunderstorms will be possible this evening into tonight across the western Gulf Coast states. Temperatures across much of the central and eastern CONUS will remain below average and chilly to end the week. Read More >

Current conditions at

Islip, Long Island Mac Arthur Airport (KISP)

Lat: 40.79°NLon: 73.1°WElev: 98ft.

A Few Clouds

40°F

4°C

Humidity 58%
Wind Speed N 10 mph
Barometer 30.02 in (1016.5 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 3 Dec 11:56 am EST
Extended Forecast for

Islip NY

  • This Afternoon

    This Afternoon: Sunny, with a high near 43. Northwest wind 6 to 10 mph.

    High: 43 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 30. Wind chill values between 20 and 25. West wind 3 to 8 mph.

    Low: 30 °F

    Mostly Clear

  • Thursday

    Thursday: Increasing clouds, with a high near 40. Wind chill values between 20 and 30. West wind 9 to 16 mph, with gusts as high as 28 mph.

    High: 40 °F

    Increasing
    Clouds

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 17. Wind chill values between 10 and 15. Northwest wind 6 to 16 mph, with gusts as high as 29 mph.

    Low: 17 °F

    Mostly Clear

  • Friday

    Friday: A 20 percent chance of light snow after 4pm. Increasing clouds, with a high near 33. North wind 5 to 8 mph becoming south in the afternoon.

    High: 33 °F

    Mostly Sunny
    then Slight
    Chance Light
    Snow

  • Friday Night

    Friday Night: A 40 percent chance of light snow after 7pm. Mostly cloudy, with a low around 27.

    Low: 27 °F

    Chance Light
    Snow

  • Saturday

    Saturday: A 30 percent chance of light rain before 1pm. Partly sunny, with a high near 41.

    High: 41 °F

    Chance Light
    Rain

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 41.

    High: 41 °F

    Partly Sunny

Detailed Forecast

This Afternoon
Sunny, with a high near 43. Northwest wind 6 to 10 mph.
Tonight
Mostly clear, with a low around 30. Wind chill values between 20 and 25. West wind 3 to 8 mph.
Thursday
Increasing clouds, with a high near 40. Wind chill values between 20 and 30. West wind 9 to 16 mph, with gusts as high as 28 mph.
Thursday Night
Mostly clear, with a low around 17. Wind chill values between 10 and 15. Northwest wind 6 to 16 mph, with gusts as high as 29 mph.
Friday
A 20 percent chance of light snow after 4pm. Increasing clouds, with a high near 33. North wind 5 to 8 mph becoming south in the afternoon.
Friday Night
A 40 percent chance of light snow after 7pm. Mostly cloudy, with a low around 27.
Saturday
A 30 percent chance of light rain before 1pm. Partly sunny, with a high near 41.
Saturday Night
Mostly cloudy, with a low around 29.
Sunday
Partly sunny, with a high near 41.
Sunday Night
Mostly cloudy, with a low around 25.
Monday
Partly sunny, with a high near 35.
Monday Night
Partly cloudy, with a low around 21.
Tuesday
Partly sunny, with a high near 39.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Islip NY
 40.73°N 73.22°W (Elev. 7 ft)
Last Update:
3:11 am EST Dec 3, 2025
Forecast Valid:
12pm EST Dec 3, 2025-6pm EST Dec 9, 2025
 
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Additional Resources

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Chance of Precipitation