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.

Partly Cloudy

83°F

28°C

Humidity 46%
Wind Speed E 5 mph
Barometer 30.29 in (1026.1 mb)
Dewpoint 60°F (16°C)
Visibility 10.00 mi
Heat Index83°F (28°C)
Last update 5 Aug 1:53 pm EDT
Extended Forecast for

Mercersburg PASimilar City Names

  • Tonight

    Tonight: Widespread haze between 9pm and 10pm. Mostly cloudy, with a low around 64. Light and variable wind.

    Low: 64 °F

    Haze then
    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 83. Calm wind becoming east around 6 mph in the afternoon.

    High: 83 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 62. Light east wind.

    Low: 62 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 85. Calm wind becoming southeast around 6 mph in the afternoon.

    High: 85 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 62. Southeast wind around 5 mph becoming calm in the evening.

    Low: 62 °F

    Partly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 61.

    Low: 61 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 87.

    High: 87 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

Detailed Forecast

Tonight
Widespread haze between 9pm and 10pm. Mostly cloudy, with a low around 64. Light and variable wind.
Wednesday
Mostly cloudy, with a high near 83. Calm wind becoming east around 6 mph in the afternoon.
Wednesday Night
Partly cloudy, with a low around 62. Light east wind.
Thursday
Mostly sunny, with a high near 85. Calm wind becoming southeast around 6 mph in the afternoon.
Thursday Night
Partly cloudy, with a low around 62. Southeast wind around 5 mph becoming calm in the evening.
Friday
Mostly sunny, with a high near 85.
Friday Night
Mostly clear, with a low around 61.
Saturday
Sunny, with a high near 87.
Saturday Night
Partly cloudy, with a low around 64.
Sunday
Mostly sunny, with a high near 90.
Sunday Night
Mostly clear, with a low around 66.
Monday
Mostly sunny and hot, with a high near 93.
Monday Night
Mostly clear, with a low around 69.
Tuesday
A chance of showers. Mostly sunny and hot, with a high near 95. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Mercersburg PASimilar City Names
 39.82°N 77.9°W (Elev. 600 ft)
Last Update:
2:35 pm EDT Aug 5, 2025
Forecast Valid:
3pm EDT Aug 5, 2025-6pm EDT Aug 12, 2025
 
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