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.

N/A

Humidity NA
Wind Speed NA
Barometer NA
Dewpoint N/A
Visibility NA
Last update *** Not a current observation ***
Extended Forecast for

3 Miles S Mercersburg PA

Dense Fog Advisory until November 26, 08:00am
Click here for hazard details and duration
Dense Fog Advisory
  •  
    Dense Fog Advisory until November 26, 08:00am

    NOW until 8:00am Wed

    Dense Fog Advisory

  • Overnight

    Low: 47 °F

    Patchy Dense
    Fog

  • Wednesday

    Wednesday: Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 65. Light southwest wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 24 mph.

    High: 65 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 33. West wind around 11 mph, with gusts as high as 31 mph.

    Low: 33 °F

    Partly Cloudy

  • Thanksgiving Day

    Thanksgiving Day: Mostly cloudy, with a high near 39. West wind 10 to 15 mph, with gusts as high as 33 mph.

    High: 39 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 27. West wind 10 to 14 mph, with gusts as high as 32 mph.

    Low: 27 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Saturday

    Saturday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

Detailed Forecast

Overnight
Patchy dense fog. Otherwise, mostly cloudy, with a low around 47. Light southwest wind.
Wednesday
Patchy fog before 8am. Otherwise, mostly cloudy, then gradually becoming sunny, with a high near 65. Light southwest wind becoming west 8 to 13 mph in the morning. Winds could gust as high as 24 mph.
Wednesday Night
Partly cloudy, with a low around 33. West wind around 11 mph, with gusts as high as 31 mph.
Thanksgiving Day
Mostly cloudy, with a high near 39. West wind 10 to 15 mph, with gusts as high as 33 mph.
Thursday Night
Partly cloudy, with a low around 27. West wind 10 to 14 mph, with gusts as high as 32 mph.
Friday
Mostly sunny, with a high near 39.
Friday Night
Partly cloudy, with a low around 25.
Saturday
Mostly sunny, with a high near 41.
Saturday Night
Mostly cloudy, with a low around 27.
Sunday
A chance of showers after 1pm. Cloudy, with a high near 44. Chance of precipitation is 30%.
Sunday Night
A chance of showers. Cloudy, with a low around 33. Chance of precipitation is 40%.
Monday
A chance of showers. Mostly cloudy, with a high near 44. Chance of precipitation is 30%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 29. Chance of precipitation is 50%.
Tuesday
A chance of showers. Mostly cloudy, with a high near 39. Chance of precipitation is 50%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
3 Miles S Mercersburg PA
 39.8°N 77.91°W (Elev. 600 ft)
Last Update:
2:16 am EST Nov 26, 2025
Forecast Valid:
3am EST Nov 26, 2025-6pm EST Dec 2, 2025
 
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