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.

Partly Cloudy

32°F

0°C

Humidity 73%
Wind Speed Calm
Barometer 30.17 in (1021.7 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Last update 18 Nov 11:56 pm EST
Extended Forecast for

Upton NY

  • Overnight

    Overnight: A chance of rain after 1am, mixing with snow after 4am. Mostly cloudy, with a low around 35. Calm wind. Chance of precipitation is 40%.

    Low: 35 °F

    Chance
    Rain/Snow

  • Wednesday

    Wednesday: A chance of rain and snow before 7am, then a slight chance of rain between 7am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 48. Calm wind becoming north around 5 mph. Chance of precipitation is 30%.

    High: 48 °F

    Chance
    Rain/Snow
    then Slight
    Chance Rain

  • Wednesday Night

    Wednesday Night: Areas of frost before 1am. Otherwise, mostly cloudy, with a low around 34. Calm wind.

    Low: 34 °F

    Areas Frost

  • Thursday

    Thursday: Partly sunny, with a high near 50. Northeast wind 3 to 6 mph.

    High: 50 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 41. Calm wind.

    Low: 41 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Friday

    Friday: Mostly cloudy, with a high near 55.

    High: 55 °F

    Mostly Cloudy

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 40.

    Low: 40 °F

    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 51.

    High: 51 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 34.

    Low: 34 °F

    Partly Cloudy

Detailed Forecast

Overnight
A chance of rain after 1am, mixing with snow after 4am. Mostly cloudy, with a low around 35. Calm wind. Chance of precipitation is 40%.
Wednesday
A chance of rain and snow before 7am, then a slight chance of rain between 7am and 1pm. Cloudy, then gradually becoming mostly sunny, with a high near 48. Calm wind becoming north around 5 mph. Chance of precipitation is 30%.
Wednesday Night
Areas of frost before 1am. Otherwise, mostly cloudy, with a low around 34. Calm wind.
Thursday
Partly sunny, with a high near 50. Northeast wind 3 to 6 mph.
Thursday Night
A 20 percent chance of rain after 1am. Mostly cloudy, with a low around 41. Calm wind.
Friday
Mostly cloudy, with a high near 55.
Friday Night
Mostly cloudy, with a low around 40.
Saturday
Partly sunny, with a high near 51.
Saturday Night
Partly cloudy, with a low around 34.
Sunday
Mostly sunny, with a high near 51.
Sunday Night
Partly cloudy, with a low around 38.
Monday
Mostly sunny, with a high near 52.
Monday Night
Partly cloudy, with a low around 38.
Tuesday
Mostly sunny, with a high near 53.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Upton NY
 40.87°N 72.89°W (Elev. 89 ft)
Last Update:
8:17 pm EST Nov 18, 2025
Forecast Valid:
12am EST Nov 19, 2025-6pm EST Nov 25, 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