National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Dangerous Heat in the East; Critical Fire Weather in the Southwest

Dangerous, record-breaking heat will intensify across most of the central and eastern U.S this week. Heat indices will likely exceed 100 degrees. Heat is likely to continue across the eastern U.S. through the Independence Day holiday weekend. Critical fire weather conditions will continue today and likely Tuesday across portions of the Four Corners and northern High Plains. Read More >

Hazardous Weather Conditions

Current conditions at

Hagerstown, Washington County Regional Airport (KHGR)

Lat: 39.71°NLon: 77.73°WElev: 702ft.

Partly Cloudy

82°F

28°C

Humidity 63%
Wind Speed W 8 mph
Barometer 30.13 in (1020.5 mb)
Dewpoint 68°F (20°C)
Visibility 10.00 mi
Heat Index85°F (29°C)
Last update 29 Jun 12:53 pm EDT
Extended Forecast for

South Mountain PA

Extreme Heat Watch July 1, 12:00pm until July 3, 08:00pm
Click here for hazard details and duration
Extreme Heat Watch

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 82. Calm wind.

    High: 82 °F

    Partly Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 66. Calm wind becoming south around 5 mph.

    Low: 66 °F

    Mostly Clear

  • Tuesday

    Tuesday: Mostly sunny, with a high near 86. South wind 5 to 8 mph.

    High: 86 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 69. South wind around 8 mph.

    Low: 69 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 92. West wind around 6 mph.

    High: 92 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 73.

    Low: 73 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny and hot, with a high near 96.

    High: 96 °F

    Hot

  • Thursday Night

    Thursday Night: Clear, with a low around 75.

    Low: 75 °F

    Clear

  • Friday

    Friday: Sunny and hot, with a high near 97.

    High: 97 °F

    Hot

Detailed Forecast

This Afternoon
Partly sunny, with a high near 82. Calm wind.
Tonight
Mostly clear, with a low around 66. Calm wind becoming south around 5 mph.
Tuesday
Mostly sunny, with a high near 86. South wind 5 to 8 mph.
Tuesday Night
Mostly clear, with a low around 69. South wind around 8 mph.
Wednesday
Sunny and hot, with a high near 92. West wind around 6 mph.
Wednesday Night
Mostly clear, with a low around 73.
Thursday
Sunny and hot, with a high near 96.
Thursday Night
Clear, with a low around 75.
Friday
Sunny and hot, with a high near 97.
Friday Night
Partly cloudy, with a low around 74.
Independence Day
A chance of showers and thunderstorms. Mostly sunny and hot, with a high near 93. Chance of precipitation is 30%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 71. Chance of precipitation is 40%.
Sunday
A chance of showers and thunderstorms. Mostly sunny, with a high near 90. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
South Mountain PA
 39.83°N 77.53°W (Elev. 1280 ft)
Last Update:
12:46 pm EDT Jun 29, 2026
Forecast Valid:
1pm EDT Jun 29, 2026-6pm EDT Jul 5, 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