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

Hazardous Weather Conditions

Current conditions at

Harrisburg, Harrisburg International Airport (KMDT)

Lat: 40.19°NLon: 76.76°WElev: 312ft.

Mostly Cloudy

75°F

24°C

Humidity 64%
Wind Speed W 7 mph
Barometer 29.84 in (1010.2 mb)
Dewpoint 62°F (17°C)
Visibility 10.00 mi
Last update 23 Aug 4:56 pm EDT
Extended Forecast for

Hummelstown PA

  • Tonight

    Tonight: Partly cloudy, with a low around 58. West wind 5 to 10 mph becoming light southwest after midnight.

    Low: 58 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 78. West wind 5 to 10 mph.

    High: 78 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 58. West wind 3 to 6 mph.

    Low: 58 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 81. Northwest wind 5 to 10 mph.

    High: 81 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 60. West wind around 5 mph becoming calm in the evening.

    Low: 60 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 84.

    High: 84 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of showers after 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.

    Low: 66 °F

    Partly Cloudy
    then Chance
    Showers

  • Thursday

    Thursday: A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 70%.

    High: 86 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.

    Low: 67 °F

    Showers
    Likely

Detailed Forecast

Tonight
Partly cloudy, with a low around 58. West wind 5 to 10 mph becoming light southwest after midnight.
Monday
Mostly sunny, with a high near 78. West wind 5 to 10 mph.
Monday Night
Partly cloudy, with a low around 58. West wind 3 to 6 mph.
Tuesday
Mostly sunny, with a high near 81. Northwest wind 5 to 10 mph.
Tuesday Night
Mostly clear, with a low around 60. West wind around 5 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 84.
Wednesday Night
A chance of showers after 2am. Mostly cloudy, with a low around 66. Chance of precipitation is 30%.
Thursday
A chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 86. Chance of precipitation is 70%.
Thursday Night
Showers likely and possibly a thunderstorm before 2am. Mostly cloudy, with a low around 67. Chance of precipitation is 60%.
Friday
Mostly sunny, with a high near 85.
Friday Night
Mostly clear, with a low around 65.
Saturday
Sunny, with a high near 82.
Saturday Night
Mostly clear, with a low around 63.
Sunday
Mostly sunny, with a high near 83.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hummelstown PA
 40.26°N 76.73°W (Elev. 335 ft)
Last Update:
4:11 pm EDT Aug 23, 2026
Forecast Valid:
5pm EDT Aug 23, 2026-6pm EDT Aug 30, 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