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

Hazardous Weather Conditions

Current conditions at

Shirley, Brookhaven Airport (KHWV)

Lat: 40.82°NLon: 72.87°WElev: 82ft.

Overcast

30°F

-1°C

Humidity 58%
Wind Speed Calm
Barometer 30.14 in (1020.8 mb)
Dewpoint 17°F (-8°C)
Visibility NA
Last update 5 Dec 2:56 pm EST
Extended Forecast for

Mount Sinai NY

  • Tonight

    Tonight: A slight chance of snow before midnight, then a chance of freezing rain between midnight and 4am, then a chance of drizzle or freezing rain after 4am. Mostly cloudy, with a temperature rising to around 33 by 5am. Calm wind. Chance of precipitation is 30%.

    Low: 30 °F⇑

    Slight Chance
    Light Snow
    then Chance
    Drizzle/Freezing
    Rain

  • Saturday

    Saturday: A chance of drizzle before 1pm. Cloudy, with a high near 42. Calm wind becoming west 5 to 7 mph in the morning.

    High: 42 °F

    Chance
    Drizzle

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 30. West wind around 7 mph.

    Low: 30 °F

    Partly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 39. North wind around 6 mph becoming southwest in the afternoon.

    High: 39 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 26. Light southwest wind becoming northwest 5 to 10 mph in the evening.

    Low: 26 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Monday

    Monday: Mostly sunny, with a high near 32.

    High: 32 °F

    Mostly Sunny

  • Monday Night

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

    Low: 19 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 38.

    High: 38 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A slight chance of snow before midnight, then a chance of freezing rain between midnight and 4am, then a chance of drizzle or freezing rain after 4am. Mostly cloudy, with a temperature rising to around 33 by 5am. Calm wind. Chance of precipitation is 30%.
Saturday
A chance of drizzle before 1pm. Cloudy, with a high near 42. Calm wind becoming west 5 to 7 mph in the morning.
Saturday Night
Partly cloudy, with a low around 30. West wind around 7 mph.
Sunday
Partly sunny, with a high near 39. North wind around 6 mph becoming southwest in the afternoon.
Sunday Night
A 20 percent chance of snow after 1am. Mostly cloudy, with a low around 26. Light southwest wind becoming northwest 5 to 10 mph in the evening.
Monday
Mostly sunny, with a high near 32.
Monday Night
Partly cloudy, with a low around 19.
Tuesday
Mostly sunny, with a high near 38.
Tuesday Night
Mostly cloudy, with a low around 32.
Wednesday
A 30 percent chance of rain after 1pm. Mostly cloudy, with a high near 47.
Wednesday Night
A 50 percent chance of rain. Mostly cloudy, with a low around 35.
Thursday
A 40 percent chance of rain. Partly sunny, with a high near 44.
Thursday Night
Mostly cloudy, with a low around 29.
Friday
Partly sunny, with a high near 40.
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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:
1:11 pm EST Dec 5, 2025
Forecast Valid:
3pm EST Dec 5, 2025-6pm EST Dec 12, 2025
 
Forecast Discussion
 
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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

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation