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.

A Few Clouds

72°F

22°C

Humidity 79%
Wind Speed N 6 mph
Barometer 30.09 in (1019.3 mb)
Dewpoint 65°F (18°C)
Visibility 10.00 mi
Last update 20 May 10:53 pm EDT
Extended Forecast for

3 Miles SSW Mercersburg PA

  • Tonight

    Tonight: Showers likely, mainly after 3am. Cloudy, with a low around 56. North wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 56 °F

    Showers
    Likely

  • Thursday

    Thursday: Rain and possibly a thunderstorm before 1pm, then rain likely. High near 64. Northeast wind 6 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 64 °F

    Rain

  • Thursday Night

    Thursday Night: A slight chance of showers after 2am. Mostly cloudy, with a low around 52. Calm wind. Chance of precipitation is 20%.

    Low: 52 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Friday

    Friday: Showers, mainly after 2pm. High near 61. East wind 5 to 7 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 61 °F

    Chance
    Showers then
    Showers

  • Friday Night

    Friday Night: Showers. Low around 49. East wind 3 to 5 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 49 °F

    Showers

  • Saturday

    Saturday: Showers, with thunderstorms also possible after 11am. High near 60. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    High: 60 °F

    Showers

  • Saturday Night

    Saturday Night: Showers. Low around 53. Chance of precipitation is 80%.

    Low: 53 °F

    Showers

  • Sunday

    Sunday: Showers likely, mainly before 8am. Mostly cloudy, with a high near 74. Chance of precipitation is 60%.

    High: 74 °F

    Showers
    Likely

  • Sunday Night

    Sunday Night: A chance of showers. Mostly cloudy, with a low around 59. Chance of precipitation is 50%.

    Low: 59 °F

    Chance
    Showers

Detailed Forecast

Tonight
Showers likely, mainly after 3am. Cloudy, with a low around 56. North wind around 6 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
Rain and possibly a thunderstorm before 1pm, then rain likely. High near 64. Northeast wind 6 to 8 mph, with gusts as high as 20 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday Night
A slight chance of showers after 2am. Mostly cloudy, with a low around 52. Calm wind. Chance of precipitation is 20%.
Friday
Showers, mainly after 2pm. High near 61. East wind 5 to 7 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Showers. Low around 49. East wind 3 to 5 mph. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday
Showers, with thunderstorms also possible after 11am. High near 60. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Saturday Night
Showers. Low around 53. Chance of precipitation is 80%.
Sunday
Showers likely, mainly before 8am. Mostly cloudy, with a high near 74. Chance of precipitation is 60%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 59. Chance of precipitation is 50%.
Memorial Day
Showers likely, mainly after 2pm. Mostly cloudy, with a high near 77. Chance of precipitation is 60%.
Monday Night
Showers likely. Mostly cloudy, with a low around 60. Chance of precipitation is 60%.
Tuesday
A chance of showers. Mostly cloudy, with a high near 80. Chance of precipitation is 40%.
Tuesday Night
Mostly cloudy, with a low around 61.
Wednesday
Partly sunny, with a high near 82.
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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:
10:12 pm EDT May 20, 2026
Forecast Valid:
11pm EDT May 20, 2026-6pm EDT May 27, 2026
 
Forecast Discussion
 
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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