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.

Fog/Mist

41°F

5°C

Humidity 87%
Wind Speed NW 3 mph
Barometer 30.18 in
Dewpoint 37°F (3°C)
Visibility 4.00 mi
Last update 20 Nov 11:54 am EST
Extended Forecast for

Mercersburg PA

  • This Afternoon

    This Afternoon: Cloudy, with a high near 47. Calm wind.

    High: 47 °F

    Cloudy

  • Tonight

    Tonight: Patchy fog before 1am, then patchy fog after 2am. Otherwise, cloudy, with a low around 40. Calm wind.

    Low: 40 °F

    Cloudy then
    Patchy Fog

  • Friday

    Friday: A chance of showers after noon. Patchy fog before 10am. Otherwise, cloudy, with a high near 55. Light and variable wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 55 °F

    Chance
    Showers and
    Patchy Fog

  • Friday Night

    Friday Night: Showers, mainly after 7pm. Low around 44. Light and variable wind. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 44 °F

    Showers

  • Saturday

    Saturday: A chance of showers before 1pm. Partly sunny, with a high near 53. Northwest wind 5 to 7 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 53 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 30.

    Low: 30 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 36.

    Low: 36 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 57.

    High: 57 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Cloudy, with a high near 47. Calm wind.
Tonight
Patchy fog before 1am, then patchy fog after 2am. Otherwise, cloudy, with a low around 40. Calm wind.
Friday
A chance of showers after noon. Patchy fog before 10am. Otherwise, cloudy, with a high near 55. Light and variable wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Showers, mainly after 7pm. Low around 44. Light and variable wind. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
A chance of showers before 1pm. Partly sunny, with a high near 53. Northwest wind 5 to 7 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Mostly clear, with a low around 30.
Sunday
Sunny, with a high near 54.
Sunday Night
Partly cloudy, with a low around 36.
Monday
Mostly sunny, with a high near 57.
Monday Night
Mostly cloudy, with a low around 39.
Tuesday
A chance of rain. Mostly cloudy, with a high near 54. Chance of precipitation is 40%.
Tuesday Night
Rain likely. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.
Wednesday
Partly sunny, with a high near 62.
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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:
12:03 pm EST Nov 20, 2025
Forecast Valid:
12pm EST Nov 20, 2025-6pm EST Nov 26, 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