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

Record Heat for the Intermountain West and Northern Plains; Heavy Rainfall and Severe Weather Threats

Record setting heat is expected over the next several days from the Intermountain West through the northern Plains. Furthermore, fire weather concerns increase with dry and breezy conditions. Meanwhile, heavy rainfall and severe thunderstorm threats for the Ohio/Tennessee Valleys, central Appalachians and Southeast today. The threat shifts to central Gulf Coast and across central Texas this week. Read More >

Current conditions at

Hagerstown, Washington County Regional Airport (KHGR)

Lat: 39.71°NLon: 77.73°WElev: 702ft.

A Few Clouds

84°F

29°C

Humidity 57%
Wind Speed E 8 mph
Barometer 30.15 in (1021.3 mb)
Dewpoint 67°F (19°C)
Visibility 10.00 mi
Heat Index87°F (31°C)
Last update 12 Jul 2:53 pm EDT
Extended Forecast for

4 Miles NW Mercersburg PA

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 82. East wind around 6 mph.

    High: 82 °F

    Partly Sunny

  • Tonight

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

    Low: 62 °F

    Partly Cloudy

  • Monday

    Monday: Sunny, with a high near 82. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 82 °F

    Sunny

  • Monday Night

    Monday Night: Clear, with a low around 62. Calm wind.

    Low: 62 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 88. Light southwest wind.

    High: 88 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Clear, with a low around 67.

    Low: 67 °F

    Clear

  • Wednesday

    Wednesday: Sunny and hot, with a high near 93.

    High: 93 °F

    Hot

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 70.

    Low: 70 °F

    Mostly Clear

  • Thursday

    Thursday: Mostly sunny, with a high near 89.

    High: 89 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Partly sunny, with a high near 82. East wind around 6 mph.
Tonight
Partly cloudy, with a low around 62. Southeast wind around 5 mph becoming calm in the evening.
Monday
Sunny, with a high near 82. Calm wind becoming southeast around 5 mph in the afternoon.
Monday Night
Clear, with a low around 62. Calm wind.
Tuesday
Sunny, with a high near 88. Light southwest wind.
Tuesday Night
Clear, with a low around 67.
Wednesday
Sunny and hot, with a high near 93.
Wednesday Night
Mostly clear, with a low around 70.
Thursday
Mostly sunny, with a high near 89.
Thursday Night
Partly cloudy, with a low around 67.
Friday
A chance of showers and thunderstorms. Mostly sunny, with a high near 87. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 67. Chance of precipitation is 30%.
Saturday
A chance of showers. Mostly sunny, with a high near 85. Chance of precipitation is 40%.
Saturday Night
A chance of showers. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 82.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
4 Miles NW Mercersburg PA
 39.87°N 77.95°W (Elev. 997 ft)
Last Update:
3:03 pm EDT Jul 12, 2026
Forecast Valid:
3pm EDT Jul 12, 2026-6pm EDT Jul 19, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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