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.

Fair

73°F

23°C

Humidity 71%
Wind Speed SW 6 mph
Barometer 30.05 in (1017.9 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 20 May 5:53 am EDT
Extended Forecast for

3 Miles SSW Mercersburg PA

  • Today

    Today: Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2pm. High near 86. Calm wind becoming west 5 to 7 mph in the morning. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Slight Chance
    Showers then
    Showers

  • Tonight

    Tonight: Showers likely, mainly before 8pm. Mostly cloudy, with a low around 55. North wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 55 °F

    Showers
    Likely

  • Thursday

    Thursday: Showers, mainly before 1pm. High near 65. Northeast wind 6 to 8 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 65 °F

    Showers

  • Thursday Night

    Thursday Night: A chance of rain after 2am. Mostly cloudy, with a low around 52. Calm wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 52 °F

    Mostly Cloudy
    then Chance
    Rain

  • Friday

    Friday: Rain, mainly after 8am. High near 60. East wind 5 to 7 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    High: 60 °F

    Rain

  • Friday Night

    Friday Night: Rain. Low around 49. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 49 °F

    Rain

  • Saturday

    Saturday: Rain. High near 59. Chance of precipitation is 90%.

    High: 59 °F

    Rain

  • Saturday Night

    Saturday Night: Rain likely before 8pm, then showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 70%.

    Low: 52 °F

    Rain Likely

  • Sunday

    Sunday: A chance of showers. Mostly cloudy, with a high near 70. Chance of precipitation is 40%.

    High: 70 °F

    Chance
    Showers

Detailed Forecast

Today
Showers and thunderstorms likely, then showers and possibly a thunderstorm after 2pm. High near 86. Calm wind becoming west 5 to 7 mph in the morning. Chance of precipitation is 80%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tonight
Showers likely, mainly before 8pm. Mostly cloudy, with a low around 55. North wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
Showers, mainly before 1pm. High near 65. Northeast wind 6 to 8 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
A chance of rain after 2am. Mostly cloudy, with a low around 52. Calm wind. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Rain, mainly after 8am. High near 60. East wind 5 to 7 mph. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Friday Night
Rain. Low around 49. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Rain. High near 59. Chance of precipitation is 90%.
Saturday Night
Rain likely before 8pm, then showers likely, mainly between 8pm and 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 70%.
Sunday
A chance of showers. Mostly cloudy, with a high near 70. Chance of precipitation is 40%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 59. Chance of precipitation is 50%.
Memorial Day
A chance of showers. Mostly cloudy, with a high near 78. Chance of precipitation is 50%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 30%.
Tuesday
A chance of showers. Mostly cloudy, with a high near 81. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Mercersburg PA
 39.78°N 77.94°W (Elev. 551 ft)
Last Update:
6:24 am EDT May 20, 2026
Forecast Valid:
6am EDT May 20, 2026-6pm EDT May 26, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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