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.

Overcast

74°F

23°C

Humidity 82%
Wind Speed Calm
Barometer 30.09 in (1019.2 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Last update 8 Jul 10:53 am EDT
Extended Forecast for

Mercersburg PA

  • Today

    Today: Scattered showers before 2pm, then isolated showers and thunderstorms between 2pm and 5pm. Mostly cloudy, with a high near 81. Light and variable wind. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 81 °F

    Scattered
    Showers

  • Tonight

    Tonight: Isolated showers and thunderstorms, then scattered showers after 2am. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 68. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.

    Low: 68 °F

    Scattered
    Showers and
    Patchy Fog

  • Thursday

    Thursday: Showers and thunderstorms likely, mainly before 5pm, then showers likely and possibly a thunderstorm after 5pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 85. Light south wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Scattered
    T-storms and
    Patchy Fog
    then T-storms
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 7pm, then scattered showers and thunderstorms between 7pm and 8pm. Mostly cloudy during the early evening, then becoming mostly clear, with a low around 68. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 68 °F

    Showers
    Likely then
    Mostly Clear

  • Friday

    Friday: A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 86. Calm wind becoming west 5 to 7 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Slight Chance
    T-storms then
    Showers
    Likely

  • Friday Night

    Friday Night: Showers and thunderstorms likely before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 66 °F

    Showers
    Likely then
    Slight Chance
    Showers

  • Saturday

    Saturday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 83.

    High: 83 °F

    Mostly Sunny

Detailed Forecast

Today
Scattered showers before 2pm, then isolated showers and thunderstorms between 2pm and 5pm. Mostly cloudy, with a high near 81. Light and variable wind. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Isolated showers and thunderstorms, then scattered showers after 2am. Patchy fog after 10pm. Otherwise, mostly cloudy, with a low around 68. South wind around 5 mph becoming calm in the evening. Chance of precipitation is 30%.
Thursday
Showers and thunderstorms likely, mainly before 5pm, then showers likely and possibly a thunderstorm after 5pm. Patchy fog before 10am. Otherwise, mostly cloudy, with a high near 85. Light south wind. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely and possibly a thunderstorm before 7pm, then scattered showers and thunderstorms between 7pm and 8pm. Mostly cloudy during the early evening, then becoming mostly clear, with a low around 68. Calm wind. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A slight chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 86. Calm wind becoming west 5 to 7 mph in the afternoon. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and thunderstorms likely before 11pm, then a slight chance of showers between 11pm and 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday
Mostly sunny, with a high near 84.
Saturday Night
Partly cloudy, with a low around 64.
Sunday
Mostly sunny, with a high near 83.
Sunday Night
Partly cloudy, with a low around 64.
Monday
Partly sunny, with a high near 85.
Monday Night
Partly cloudy, with a low around 65.
Tuesday
Sunny, with a high near 89.
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:
8:06 am EDT Jul 8, 2026
Forecast Valid:
11am EDT Jul 8, 2026-6pm EDT Jul 14, 2026
 
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