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

Hazardous Weather Conditions

Current conditions at

Hagerstown, Washington County Regional Airport (KHGR)

Lat: 39.71°NLon: 77.73°WElev: 702ft.

Overcast and Windy

30°F

-1°C

Humidity 47%
Wind Speed W 30 mph
Barometer 29.71 in
Dewpoint 12°F (-11°C)
Visibility 10.00 mi
Wind Chill15°F (-9°C)
Last update 29 Dec 7:53 pm EST
Extended Forecast for

Mercersburg PA

Wind Advisory December 29, 08:03pm until December 30, 12:00pm
Click here for hazard details and duration
Wind Advisory
  •  
    Wind Advisory December 29, 08:03pm until December 30, 12:00pm

    NOW until 12:00pm Tue

    Wind Advisory

  • Tonight

    Low: 23 °F

    Mostly Cloudy
    and Breezy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 32. Breezy, with a west wind 14 to 24 mph, with gusts as high as 45 mph.

    High: 32 °F

    Mostly Sunny
    and Breezy
    then Mostly
    Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 23. West wind 6 to 10 mph, with gusts as high as 23 mph.

    Low: 23 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 37. West wind 6 to 10 mph, with gusts as high as 22 mph.

    High: 37 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: A chance of snow showers before 1am. Mostly cloudy, with a low around 22. West wind around 7 mph. Chance of precipitation is 30%.

    Low: 22 °F

    Chance Snow
    Showers

  • New Year's Day

    New Year's Day: Mostly sunny, with a high near 29.

    High: 29 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 18.

    Low: 18 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

Detailed Forecast

Tonight
Mostly cloudy, with a low around 23. Breezy, with a west wind 21 to 23 mph, with gusts as high as 50 mph.
Tuesday
Mostly sunny, with a high near 32. Breezy, with a west wind 14 to 24 mph, with gusts as high as 45 mph.
Tuesday Night
Mostly cloudy, with a low around 23. West wind 6 to 10 mph, with gusts as high as 23 mph.
Wednesday
Mostly cloudy, with a high near 37. West wind 6 to 10 mph, with gusts as high as 22 mph.
Wednesday Night
A chance of snow showers before 1am. Mostly cloudy, with a low around 22. West wind around 7 mph. Chance of precipitation is 30%.
New Year's Day
Mostly sunny, with a high near 29.
Thursday Night
Partly cloudy, with a low around 18.
Friday
Mostly sunny, with a high near 39.
Friday Night
Partly cloudy, with a low around 24.
Saturday
Mostly cloudy, with a high near 39.
Saturday Night
Partly cloudy, with a low around 22.
Sunday
Mostly sunny, with a high near 39.
Sunday Night
Mostly cloudy, with a low around 25.
Monday
Partly sunny, with a high near 42.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercersburg PA
 39.82°N 77.9°W (Elev. 600 ft)
Last Update:
7:06 pm EST Dec 29, 2025
Forecast Valid:
8pm EST Dec 29, 2025-6pm EST Jan 5, 2026
 
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