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.

Light Rain

38°F

3°C

Humidity 73%
Wind Speed SE 6 mph
Barometer 29.43 in (997.9 mb)
Dewpoint 30°F (-1°C)
Visibility 9.00 mi
Wind Chill33°F (1°C)
Last update 10 Dec 2:53 pm EST
Extended Forecast for

Mercersburg PA

  • This Afternoon

    This Afternoon: A chance of rain, mainly before 4pm. Mostly cloudy, with a high near 41. Southwest wind around 8 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 41 °F

    Chance Rain

  • Tonight

    Tonight: Partly cloudy, with a low around 29. Southwest wind 7 to 10 mph becoming northwest after midnight. Winds could gust as high as 32 mph.

    Low: 29 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 33. West wind 11 to 14 mph, with gusts as high as 36 mph.

    High: 33 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Increasing clouds, with a low around 24. West wind 5 to 9 mph, with gusts as high as 25 mph.

    Low: 24 °F

    Increasing
    Clouds

  • Friday

    Friday: A slight chance of snow after 1pm. Mostly cloudy, with a high near 36. Calm wind becoming southwest around 5 mph. Chance of precipitation is 20%.

    High: 36 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Friday Night

    Friday Night: A chance of snow before 1am. Mostly cloudy, with a low around 25. Chance of precipitation is 30%.

    Low: 25 °F

    Chance Snow

  • Saturday

    Saturday: Mostly cloudy, with a high near 39.

    High: 39 °F

    Mostly Cloudy

  • Saturday Night

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

    Low: 21 °F

    Chance Snow

  • Sunday

    Sunday: Partly sunny, with a high near 27.

    High: 27 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A chance of rain, mainly before 4pm. Mostly cloudy, with a high near 41. Southwest wind around 8 mph, with gusts as high as 20 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Partly cloudy, with a low around 29. Southwest wind 7 to 10 mph becoming northwest after midnight. Winds could gust as high as 32 mph.
Thursday
Mostly sunny, with a high near 33. West wind 11 to 14 mph, with gusts as high as 36 mph.
Thursday Night
Increasing clouds, with a low around 24. West wind 5 to 9 mph, with gusts as high as 25 mph.
Friday
A slight chance of snow after 1pm. Mostly cloudy, with a high near 36. Calm wind becoming southwest around 5 mph. Chance of precipitation is 20%.
Friday Night
A chance of snow before 1am. Mostly cloudy, with a low around 25. Chance of precipitation is 30%.
Saturday
Mostly cloudy, with a high near 39.
Saturday Night
A chance of snow. Mostly cloudy, with a low around 21. Chance of precipitation is 40%.
Sunday
Partly sunny, with a high near 27.
Sunday Night
Partly cloudy, with a low around 17.
Monday
Mostly sunny, with a high near 31.
Monday Night
Partly cloudy, with a low around 19.
Tuesday
Partly sunny, with a high near 38.
Tuesday Night
Mostly cloudy, with a low around 24.
Wednesday
Mostly cloudy, with a high near 42.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Mercersburg PA
 39.82°N 77.9°W (Elev. 600 ft)
Last Update:
3:06 pm EST Dec 10, 2025
Forecast Valid:
3pm EST Dec 10, 2025-6pm EST Dec 17, 2025
 
Forecast Discussion
 
Get as KML Get as XML

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