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

21°F

-6°C

Humidity 45%
Wind Speed N 5 mph
Barometer 30.29 in (1027.8 mb)
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Wind Chill14°F (-10°C)
Last update 8 Dec 9:53 pm EST
Extended Forecast for

Mercersburg PA

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 14. Light north wind.

    Low: 14 °F

    Decreasing
    Clouds

  • Tuesday

    Tuesday: Mostly sunny, with a high near 34. Calm wind becoming south 5 to 8 mph in the afternoon.

    High: 34 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 26. South wind 3 to 6 mph.

    Low: 26 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: A chance of snow before 10am, then a chance of rain and snow between 10am and 1pm, then a chance of rain after 1pm. Cloudy, with a high near 46. South wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.

    High: 46 °F

    Chance
    Rain/Snow

  • Wednesday Night

    Wednesday Night: A slight chance of rain before 1am. Mostly cloudy, with a low around 31. West wind 7 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.

    Low: 31 °F

    Slight Chance
    Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 38.

    High: 38 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of snow showers after 1pm. Partly sunny, with a high near 36. Chance of precipitation is 30%.

    High: 36 °F

    Partly Sunny
    then Chance
    Snow Showers

  • Friday Night

    Friday Night: A chance of snow showers before 1am. Mostly cloudy, with a low around 23. Chance of precipitation is 40%.

    Low: 23 °F

    Chance Snow
    Showers

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 14. Light north wind.
Tuesday
Mostly sunny, with a high near 34. Calm wind becoming south 5 to 8 mph in the afternoon.
Tuesday Night
Increasing clouds, with a low around 26. South wind 3 to 6 mph.
Wednesday
A chance of snow before 10am, then a chance of rain and snow between 10am and 1pm, then a chance of rain after 1pm. Cloudy, with a high near 46. South wind 6 to 9 mph, with gusts as high as 20 mph. Chance of precipitation is 50%. Little or no snow accumulation expected.
Wednesday Night
A slight chance of rain before 1am. Mostly cloudy, with a low around 31. West wind 7 to 9 mph, with gusts as high as 22 mph. Chance of precipitation is 20%.
Thursday
Mostly sunny, with a high near 38.
Thursday Night
Mostly cloudy, with a low around 23.
Friday
A chance of snow showers after 1pm. Partly sunny, with a high near 36. Chance of precipitation is 30%.
Friday Night
A chance of snow showers before 1am. Mostly cloudy, with a low around 23. Chance of precipitation is 40%.
Saturday
Partly sunny, with a high near 33.
Saturday Night
Mostly cloudy, with a low around 19.
Sunday
Mostly sunny, with a high near 31.
Sunday Night
Partly cloudy, with a low around 16.
Monday
Partly sunny, with a high near 31.
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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:
7:05 pm EST Dec 8, 2025
Forecast Valid:
10pm EST Dec 8, 2025-6pm EST Dec 15, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation