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

Harrisburg, Harrisburg International Airport (KMDT)

Lat: 40.19°NLon: 76.76°WElev: 312ft.

Mostly Cloudy

69°F

21°C

Humidity 61%
Wind Speed NW 6 mph
Barometer 29.87 in (1011.2 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 20 Jun 9:56 pm EDT
Extended Forecast for

Hummelstown PA

  • Tonight

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

    Low: 60 °F

    Mostly Clear

  • Sunday

    Sunday: Increasing clouds, with a high near 84. Light west wind becoming northwest 5 to 10 mph in the morning.

    High: 84 °F

    Increasing
    Clouds

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 63. Light and variable wind.

    Low: 63 °F

    Mostly Cloudy

  • Monday

    Monday: Showers likely, then showers and possibly a thunderstorm after 11am. High near 80. East wind 7 to 9 mph becoming south in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.

    High: 80 °F

    Showers
    Likely then
    Showers

  • Monday Night

    Monday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 64. South wind around 5 mph becoming calm. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.

    Low: 64 °F

    Showers

  • Tuesday

    Tuesday: A chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and 2pm. Partly sunny, with a high near 82. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Chance
    Showers then
    Slight Chance
    T-storms

  • Tuesday Night

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

    Low: 60 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 84.

    High: 84 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 62.

    Low: 62 °F

    Mostly Clear

Detailed Forecast

Tonight
Mostly clear, with a low around 60. West wind around 5 mph becoming calm in the evening.
Sunday
Increasing clouds, with a high near 84. Light west wind becoming northwest 5 to 10 mph in the morning.
Sunday Night
Mostly cloudy, with a low around 63. Light and variable wind.
Monday
Showers likely, then showers and possibly a thunderstorm after 11am. High near 80. East wind 7 to 9 mph becoming south in the afternoon. Winds could gust as high as 20 mph. Chance of precipitation is 100%. New rainfall amounts between three quarters and one inch possible.
Monday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 64. South wind around 5 mph becoming calm. Chance of precipitation is 90%. New rainfall amounts between a quarter and half of an inch possible.
Tuesday
A chance of showers before 11am, then a slight chance of showers and thunderstorms between 11am and 2pm. Partly sunny, with a high near 82. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Tuesday Night
Mostly clear, with a low around 60.
Wednesday
Sunny, with a high near 84.
Wednesday Night
Mostly clear, with a low around 62.
Thursday
Showers likely and possibly a thunderstorm, mainly after 2pm. Partly sunny, with a high near 84. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 63. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 30%.
Friday Night
A chance of showers and thunderstorms. Partly cloudy, with a low around 62. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 85.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hummelstown PA
 40.26°N 76.73°W (Elev. 335 ft)
Last Update:
8:11 pm EDT Jun 20, 2026
Forecast Valid:
10pm EDT Jun 20, 2026-6pm EDT Jun 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