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

Shirley, Brookhaven Airport (KHWV)

Lat: 40.82°NLon: 72.87°WElev: 82ft.

Overcast

41°F

5°C

Humidity 89%
Wind Speed SW 8 G 20 mph
Barometer 29.43 in (996.7 mb)
Dewpoint 38°F (3°C)
Visibility 9.00 mi
Wind Chill36°F (2°C)
Last update 10 Dec 8:56 pm EST
Extended Forecast for

Mount Sinai NY

  • Tonight

    Tonight: Rain before 10pm. Low around 28. Southwest wind 14 to 18 mph. Chance of precipitation is 80%.

    Low: 28 °F

    Rain then
    Mostly Cloudy

  • Thursday

    Thursday: A 20 percent chance of snow showers after 1pm. Mostly sunny, with a high near 36. Wind chill values between 15 and 25. Breezy, with a west wind 21 to 23 mph, with gusts as high as 41 mph.

    High: 36 °F

    Breezy. Sunny
    then Slight
    Chance Snow
    Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, then gradually becoming mostly clear, with a low around 24. Wind chill values between 10 and 20. Breezy, with a west wind 21 to 24 mph, with gusts as high as 41 mph.

    Low: 24 °F

    Decreasing
    Clouds and
    Breezy

  • Friday

    Friday: Mostly sunny, with a high near 35. Wind chill values between 10 and 20. West wind 13 to 17 mph, with gusts as high as 28 mph.

    High: 35 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 25. West wind 6 to 9 mph.

    Low: 25 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A 40 percent chance of snow after 1am. Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy
    then Chance
    Snow

  • Sunday

    Sunday: A 40 percent chance of snow before 1pm. Mostly cloudy, with a high near 33.

    High: 33 °F

    Chance Snow

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 19.

    Low: 19 °F

    Partly Cloudy

Detailed Forecast

Tonight
Rain before 10pm. Low around 28. Southwest wind 14 to 18 mph. Chance of precipitation is 80%.
Thursday
A 20 percent chance of snow showers after 1pm. Mostly sunny, with a high near 36. Wind chill values between 15 and 25. Breezy, with a west wind 21 to 23 mph, with gusts as high as 41 mph.
Thursday Night
Mostly cloudy, then gradually becoming mostly clear, with a low around 24. Wind chill values between 10 and 20. Breezy, with a west wind 21 to 24 mph, with gusts as high as 41 mph.
Friday
Mostly sunny, with a high near 35. Wind chill values between 10 and 20. West wind 13 to 17 mph, with gusts as high as 28 mph.
Friday Night
Partly cloudy, with a low around 25. West wind 6 to 9 mph.
Saturday
Partly sunny, with a high near 39.
Saturday Night
A 40 percent chance of snow after 1am. Mostly cloudy, with a low around 26.
Sunday
A 40 percent chance of snow before 1pm. Mostly cloudy, with a high near 33.
Sunday Night
Partly cloudy, with a low around 19.
Monday
Sunny, with a high near 31.
Monday Night
Mostly cloudy, with a low around 22.
Tuesday
Mostly sunny, with a high near 34.
Tuesday Night
Partly cloudy, with a low around 25.
Wednesday
Partly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mount Sinai NY
 40.95°N 73°W (Elev. 174 ft)
Last Update:
5:54 pm EST Dec 10, 2025
Forecast Valid:
9pm EST Dec 10, 2025-6pm EST Dec 17, 2025
 
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Additional Resources

Radar & Satellite Image

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation