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.

A Few Clouds

60°F

16°C

Humidity 90%
Wind Speed NW 9 mph
Barometer 30.08 in (1018.7 mb)
Dewpoint 57°F (14°C)
Visibility 10.00 mi
Last update 21 Aug 5:56 am EDT
Extended Forecast for

Hummelstown PA

  • Today

    Today: Patchy fog before 8am. Otherwise, sunny, with a high near 82. Northwest wind around 5 mph becoming calm in the afternoon.

    High: 82 °F

    Patchy Fog
    then Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 63. Calm wind.

    Low: 63 °F

    Increasing
    Clouds

  • Saturday

    Saturday: Showers likely, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 79. Southeast wind 3 to 8 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Showers
    Likely

  • Saturday Night

    Saturday Night: Showers and thunderstorms likely. Mostly cloudy, with a low around 64. East wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Showers
    Likely

  • Sunday

    Sunday: A slight chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 82. Light southwest wind becoming west 5 to 10 mph in the morning. Chance of precipitation is 20%.

    High: 82 °F

    Slight Chance
    Showers then
    Slight Chance
    T-storms

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 60.

    Low: 60 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 79.

    High: 79 °F

    Sunny

Detailed Forecast

Today
Patchy fog before 8am. Otherwise, sunny, with a high near 82. Northwest wind around 5 mph becoming calm in the afternoon.
Tonight
Increasing clouds, with a low around 63. Calm wind.
Saturday
Showers likely, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 79. Southeast wind 3 to 8 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Showers and thunderstorms likely. Mostly cloudy, with a low around 64. East wind around 6 mph becoming calm in the evening. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday
A slight chance of showers, with thunderstorms also possible after 2pm. Partly sunny, with a high near 82. Light southwest wind becoming west 5 to 10 mph in the morning. Chance of precipitation is 20%.
Sunday Night
Mostly clear, with a low around 60.
Monday
Sunny, with a high near 80.
Monday Night
Mostly clear, with a low around 59.
Tuesday
Sunny, with a high near 79.
Tuesday Night
Mostly clear, with a low around 62.
Wednesday
A chance of showers. Mostly sunny, with a high near 82. Chance of precipitation is 30%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 66. Chance of precipitation is 40%.
Thursday
A chance of showers. Partly sunny, with a high near 82. Chance of precipitation is 50%.
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ABOUT THIS FORECAST

 
Point Forecast:
Hummelstown PA
 40.26°N 76.73°W (Elev. 335 ft)
Last Update:
6:11 am EDT Aug 21, 2026
Forecast Valid:
6am EDT Aug 21, 2026-6pm EDT Aug 27, 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