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

36°F

2°C

Humidity 55%
Wind Speed Calm
Barometer 30.12 in (1021.5 mb)
Dewpoint 21°F (-6°C)
Visibility 10.00 mi
Last update 17 Nov 11:53 pm EST
Extended Forecast for

Mercersburg PA

  • Overnight

    Overnight: Mostly clear, with a low around 28. Calm wind.

    Low: 28 °F

    Mostly Clear

  • Tuesday

    Tuesday: A slight chance of snow showers before 10am, then a slight chance of rain and snow showers between 10am and 1pm, then rain showers likely after 1pm. Increasing clouds, with a high near 45. Light west wind. Chance of precipitation is 60%. Little or no snow accumulation expected.

    High: 45 °F

    Slight Chance
    Rain/Snow
    then
    Rain/Snow
    Likely

  • Tuesday Night

    Tuesday Night: Showers likely, mainly before 1am. Cloudy, with a low around 37. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 37 °F

    Showers
    Likely

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 50. Calm wind.

    High: 50 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Cloudy, with a low around 40. Calm wind.

    Low: 40 °F

    Cloudy

  • Thursday

    Thursday: Cloudy, with a high near 53.

    High: 53 °F

    Cloudy

  • Thursday Night

    Thursday Night: A chance of showers after 1am. Cloudy, with a low around 44. Chance of precipitation is 40%.

    Low: 44 °F

    Cloudy then
    Chance
    Showers

  • Friday

    Friday: A chance of showers. Mostly cloudy, with a high near 61. Chance of precipitation is 40%.

    High: 61 °F

    Chance
    Showers

  • Friday Night

    Friday Night: Showers likely. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.

    Low: 43 °F

    Showers
    Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 28. Calm wind.
Tuesday
A slight chance of snow showers before 10am, then a slight chance of rain and snow showers between 10am and 1pm, then rain showers likely after 1pm. Increasing clouds, with a high near 45. Light west wind. Chance of precipitation is 60%. Little or no snow accumulation expected.
Tuesday Night
Showers likely, mainly before 1am. Cloudy, with a low around 37. Calm wind. Chance of precipitation is 70%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Mostly cloudy, with a high near 50. Calm wind.
Wednesday Night
Cloudy, with a low around 40. Calm wind.
Thursday
Cloudy, with a high near 53.
Thursday Night
A chance of showers after 1am. Cloudy, with a low around 44. Chance of precipitation is 40%.
Friday
A chance of showers. Mostly cloudy, with a high near 61. Chance of precipitation is 40%.
Friday Night
Showers likely. Mostly cloudy, with a low around 43. Chance of precipitation is 60%.
Saturday
A chance of showers. Partly sunny, with a high near 55. Chance of precipitation is 40%.
Saturday Night
Partly cloudy, with a low around 35.
Sunday
Mostly sunny, with a high near 55.
Sunday Night
Partly cloudy, with a low around 35.
Monday
Mostly sunny, with a high near 57.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mercersburg PA
 39.82°N 77.9°W (Elev. 600 ft)
Last Update:
7:06 pm EST Nov 17, 2025
Forecast Valid:
12am EST Nov 18, 2025-6pm EST Nov 24, 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