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Hazardous Weather Conditions

Current conditions at

Hagerstown, Washington County Regional Airport (KHGR)

Lat: 39.71°NLon: 77.73°WElev: 702ft.

Fair

63°F

17°C

Humidity 97%
Wind Speed NW 5 mph
Barometer 30.08 in (1019.3 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 20 Aug 11:53 pm EDT
Extended Forecast for

Mercersburg PA

  • Overnight

    Overnight: Patchy fog after 1am. Otherwise, partly cloudy, with a low around 61. North wind around 5 mph becoming calm.

    Low: 61 °F

    Patchy Fog

  • Friday

    Friday: Patchy fog between 8am and 9am. Otherwise, mostly sunny, with a high near 81. North wind 3 to 5 mph.

    High: 81 °F

    Patchy Fog
    then Mostly
    Sunny

  • Friday Night

    Friday Night: A chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Partly Cloudy
    then Chance
    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms before 8am, then showers likely between 8am and 11am, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 81. Calm wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.

    High: 81 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 63 °F

    Chance
    T-storms then
    Chance
    Showers

  • Sunday

    Sunday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 58.

    Low: 58 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 56.

    Low: 56 °F

    Mostly Clear

Detailed Forecast

Overnight
Patchy fog after 1am. Otherwise, partly cloudy, with a low around 61. North wind around 5 mph becoming calm.
Friday
Patchy fog between 8am and 9am. Otherwise, mostly sunny, with a high near 81. North wind 3 to 5 mph.
Friday Night
A chance of showers and thunderstorms after 2am. Mostly cloudy, with a low around 64. Calm wind. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
A chance of showers and thunderstorms before 8am, then showers likely between 8am and 11am, then showers likely and possibly a thunderstorm after 11am. Mostly cloudy, with a high near 81. Calm wind. Chance of precipitation is 70%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
A chance of showers and thunderstorms before 11pm, then a chance of showers between 11pm and 2am. Mostly cloudy, with a low around 63. Calm wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
Mostly sunny, with a high near 81.
Sunday Night
Mostly clear, with a low around 58.
Monday
Sunny, with a high near 80.
Monday Night
Mostly clear, with a low around 56.
Tuesday
Sunny, with a high near 81.
Tuesday Night
Partly cloudy, with a low around 60.
Wednesday
A chance of showers and thunderstorms. Mostly sunny, with a high near 84. Chance of precipitation is 30%.
Wednesday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Thursday
A chance of showers. Partly sunny, with a high near 85. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Mercersburg PA
 39.82°N 77.9°W (Elev. 600 ft)
Last Update:
12:36 am EDT Aug 21, 2026
Forecast Valid:
12am EDT Aug 21, 2026-6pm EDT Aug 27, 2026
 
Forecast Discussion
 
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Additional Resources

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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