National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Hagerstown, Washington County Regional Airport (KHGR)

Lat: 39.71°NLon: 77.73°WElev: 702ft.

A Few Clouds

93°F

34°C

Humidity 49%
Wind Speed W 12 mph
Barometer 29.96 in (1014.7 mb)
Dewpoint 71°F (22°C)
Visibility 10.00 mi
Heat Index100°F (38°C)
Last update 1 Sep 3:53 pm EDT
Extended Forecast for

3 Miles WSW Mercersburg PA

  • Tonight

    Tonight: A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers and thunderstorms after 1am. Some of the storms could be severe. Mostly cloudy, with a low around 72. West wind 5 to 8 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 72 °F

    Severe
    Thunderstorms

  • Wednesday

    Wednesday: A slight chance of showers and thunderstorms. Some of the storms could be severe. Partly sunny, with a high near 90. Light and variable wind. Chance of precipitation is 20%.

    High: 90 °F

    Severe
    Thunderstorms

  • Wednesday Night

    Wednesday Night: A chance of showers and thunderstorms. Some of the storms could be severe. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 71. Light southeast wind. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 71 °F

    Severe
    Thunderstorms
    and Patchy
    Fog

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Some of the storms could be severe. Partly sunny, with a high near 89. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 89 °F

    Slight Chance
    Showers then
    Severe
    Thunderstorms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 2am. Some of the storms could be severe. Mostly cloudy, with a low around 70. Light west wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 70 °F

    Severe
    Thunderstorms
    then Chance
    Showers

  • Friday

    Friday: A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Mostly Sunny
    then Chance
    T-storms

  • Friday Night

    Friday Night: A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.

    Low: 65 °F

    Chance
    T-storms then
    Mostly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 80.

    High: 80 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 60.

    Low: 60 °F

    Partly Cloudy

Detailed Forecast

Tonight
A slight chance of showers and thunderstorms before 10pm, then a slight chance of showers and thunderstorms after 1am. Some of the storms could be severe. Mostly cloudy, with a low around 72. West wind 5 to 8 mph becoming calm in the evening. Chance of precipitation is 20%.
Wednesday
A slight chance of showers and thunderstorms. Some of the storms could be severe. Partly sunny, with a high near 90. Light and variable wind. Chance of precipitation is 20%.
Wednesday Night
A chance of showers and thunderstorms. Some of the storms could be severe. Patchy fog after 5am. Otherwise, mostly cloudy, with a low around 71. Light southeast wind. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Some of the storms could be severe. Partly sunny, with a high near 89. Calm wind becoming west around 6 mph in the afternoon. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers and thunderstorms before 2am. Some of the storms could be severe. Mostly cloudy, with a low around 70. Light west wind. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
A chance of showers and thunderstorms after 2pm. Mostly sunny, with a high near 86. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday Night
A chance of showers and thunderstorms before 8pm. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 80.
Saturday Night
Partly cloudy, with a low around 60.
Sunday
Sunny, with a high near 79.
Sunday Night
Partly cloudy, with a low around 60.
Labor Day
Mostly sunny, with a high near 80.
Monday Night
Partly cloudy, with a low around 60.
Tuesday
Partly sunny, with a high near 79.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles WSW Mercersburg PA
 39.81°N 77.97°W (Elev. 879 ft)
Last Update:
2:31 pm EDT Sep 1, 2026
Forecast Valid:
4pm EDT Sep 1, 2026-6pm EDT Sep 8, 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