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

Hagerstown, Washington County Regional Airport (KHGR)

Lat: 39.71°NLon: 77.73°WElev: 702ft.

Fair

29°F

-2°C

Humidity 75%
Wind Speed S 9 mph
Barometer 29.83 in (1012.0 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 10 Dec 12:53 am EST
Extended Forecast for

Mercersburg PA

  • Overnight

    Overnight: Cloudy, with a low around 26. South wind around 6 mph.

    Low: 26 °F

    Cloudy

  • Wednesday

    Wednesday: A slight chance of snow before 10am, then rain likely. Cloudy, with a high near 44. South wind 7 to 9 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.

    High: 44 °F

    Chance
    Rain/Snow
    then Rain
    Likely

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 27. West wind 7 to 10 mph, with gusts as high as 28 mph.

    Low: 27 °F

    Increasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 34. West wind around 17 mph, with gusts as high as 34 mph.

    High: 34 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 24. West wind 6 to 13 mph, with gusts as high as 28 mph.

    Low: 24 °F

    Partly Cloudy

  • Friday

    Friday: A chance of snow showers. Mostly cloudy, with a high near 35. Chance of precipitation is 40%.

    High: 35 °F

    Chance Snow
    Showers

  • Friday Night

    Friday Night: A chance of snow showers before 1am. Mostly cloudy, with a low around 25. Chance of precipitation is 40%.

    Low: 25 °F

    Chance Snow
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 37.

    High: 37 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: A chance of snow showers. Mostly cloudy, with a low around 21. Chance of precipitation is 40%.

    Low: 21 °F

    Chance Snow
    Showers

Detailed Forecast

Overnight
Cloudy, with a low around 26. South wind around 6 mph.
Wednesday
A slight chance of snow before 10am, then rain likely. Cloudy, with a high near 44. South wind 7 to 9 mph. Chance of precipitation is 70%. Little or no snow accumulation expected.
Wednesday Night
Increasing clouds, with a low around 27. West wind 7 to 10 mph, with gusts as high as 28 mph.
Thursday
Mostly sunny, with a high near 34. West wind around 17 mph, with gusts as high as 34 mph.
Thursday Night
Partly cloudy, with a low around 24. West wind 6 to 13 mph, with gusts as high as 28 mph.
Friday
A chance of snow showers. Mostly cloudy, with a high near 35. Chance of precipitation is 40%.
Friday Night
A chance of snow showers before 1am. Mostly cloudy, with a low around 25. Chance of precipitation is 40%.
Saturday
Partly sunny, with a high near 37.
Saturday Night
A chance of snow showers. Mostly cloudy, with a low around 21. Chance of precipitation is 40%.
Sunday
Partly sunny, with a high near 29.
Sunday Night
Partly cloudy, with a low around 15.
Monday
Mostly sunny, with a high near 30.
Monday Night
Mostly cloudy, with a low around 19.
Tuesday
Partly sunny, with a high near 36.
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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:
1:06 am EST Dec 10, 2025
Forecast Valid:
1am EST Dec 10, 2025-6pm EST Dec 16, 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