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

69°F

21°C

Humidity 81%
Wind Speed N 10 mph
Barometer 30.09 in (1019.6 mb)
Dewpoint 63°F (17°C)
Visibility 10.00 mi
Last update 21 May 1:53 am EDT
Extended Forecast for

3 Miles SSW Mercersburg PA

  • Overnight

    Overnight: Rain likely, mainly after 3am. Cloudy, with a low around 56. North wind around 5 mph. Chance of precipitation is 60%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 56 °F

    Rain Likely

  • Thursday

    Thursday: Rain and possibly a thunderstorm before 3pm, then rain likely. High near 60. Northeast wind around 7 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.

    High: 60 °F

    Rain

  • Thursday Night

    Thursday Night: A chance of rain between 8pm and midnight. Cloudy, with a low around 52. Light northeast wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 52 °F

    Chance Rain
    then Cloudy

  • Friday

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

    High: 61 °F

    Chance Rain
    then Rain

  • Friday Night

    Friday Night: Rain. Low around 51. East wind 3 to 5 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 51 °F

    Rain

  • Saturday

    Saturday: Rain. High near 56. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    High: 56 °F

    Rain

  • Saturday Night

    Saturday Night: Rain before 8pm, then showers likely, mainly between 8pm and 2am. Low around 50. Chance of precipitation is 80%.

    Low: 50 °F

    Rain

  • Sunday

    Sunday: A chance of showers before 8am. Mostly cloudy, with a high near 73. Chance of precipitation is 30%.

    High: 73 °F

    Chance
    Showers then
    Mostly Cloudy

  • Sunday Night

    Sunday Night: A chance of showers. Mostly cloudy, with a low around 59. Chance of precipitation is 40%.

    Low: 59 °F

    Chance
    Showers

Detailed Forecast

Overnight
Rain likely, mainly after 3am. Cloudy, with a low around 56. North wind around 5 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 3pm, then rain likely. High near 60. Northeast wind around 7 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Thursday Night
A chance of rain between 8pm and midnight. Cloudy, with a low around 52. Light northeast wind. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday
Rain, mainly after 2pm. High near 61. East wind 5 to 7 mph. Chance of precipitation is 80%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Rain. Low around 51. East wind 3 to 5 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday
Rain. High near 56. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Rain before 8pm, then showers likely, mainly between 8pm and 2am. Low around 50. Chance of precipitation is 80%.
Sunday
A chance of showers before 8am. Mostly cloudy, with a high near 73. Chance of precipitation is 30%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 59. Chance of precipitation is 40%.
Memorial Day
Showers likely, mainly before 2pm. Mostly cloudy, with a high near 78. Chance of precipitation is 60%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 61. Chance of precipitation is 40%.
Tuesday
A chance of showers. Mostly cloudy, with a high near 79. Chance of precipitation is 50%.
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:
2:21 am EDT May 21, 2026
Forecast Valid:
2am EDT May 21, 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