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.

Fair

39°F

4°C

Humidity 39%
Wind Speed W 6 mph
Barometer 30.15 in (1022.4 mb)
Dewpoint 16°F (-9°C)
Visibility 10.00 mi
Wind Chill35°F (2°C)
Last update 12 Jan 9:53 pm EST
Extended Forecast for

3 Miles SSW Mercersburg PA

  • Tonight

    Tonight: Mostly clear, with a low around 29. Southwest wind around 5 mph.

    Low: 29 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 49. South wind 3 to 6 mph.

    High: 49 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 39. Southwest wind 3 to 6 mph.

    Low: 39 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Rain likely, mainly after 1pm. Cloudy, with a high near 50. Southwest wind 3 to 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 50 °F

    Chance Rain
    then Rain
    Likely

  • Wednesday Night

    Wednesday Night: Rain likely before 1am, then a chance of rain and snow between 1am and 4am, then a chance of snow after 4am. Mostly cloudy, with a low around 25. Light west wind becoming northwest 5 to 10 mph in the evening. Winds could gust as high as 23 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    Low: 25 °F

    Rain Likely
    then
    Rain/Snow
    Likely

  • Thursday

    Thursday: A slight chance of snow before 1pm. Partly sunny, with a high near 31. Chance of precipitation is 20%.

    High: 31 °F

    Slight Chance
    Snow

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 32.

    High: 32 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 29. Southwest wind around 5 mph.
Tuesday
Mostly sunny, with a high near 49. South wind 3 to 6 mph.
Tuesday Night
Mostly cloudy, with a low around 39. Southwest wind 3 to 6 mph.
Wednesday
Rain likely, mainly after 1pm. Cloudy, with a high near 50. Southwest wind 3 to 6 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
Rain likely before 1am, then a chance of rain and snow between 1am and 4am, then a chance of snow after 4am. Mostly cloudy, with a low around 25. Light west wind becoming northwest 5 to 10 mph in the evening. Winds could gust as high as 23 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Thursday
A slight chance of snow before 1pm. Partly sunny, with a high near 31. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 16.
Friday
Mostly sunny, with a high near 32.
Friday Night
Mostly cloudy, with a low around 23.
Saturday
A chance of rain and snow showers after 1pm. Partly sunny, with a high near 40. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 20.
Sunday
Partly sunny, with a high near 31.
Sunday Night
Partly cloudy, with a low around 14.
M.L.King Day
Mostly sunny, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Mercersburg PA
 39.78°N 77.94°W (Elev. 551 ft)
Last Update:
9:06 pm EST Jan 12, 2026
Forecast Valid:
10pm EST Jan 12, 2026-6pm EST Jan 19, 2026
 
Forecast Discussion
 
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Additional Resources

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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