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.

Partly Cloudy

40°F

4°C

Humidity 73%
Wind Speed NW 3 mph
Barometer 30.25 in (1024.6 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Last update 14 Mar 8:56 pm EDT
Extended Forecast for

Hummelstown PA

  • Tonight

    Tonight: Mostly cloudy, with a low around 34. Light and variable wind.

    Low: 34 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 54. Southeast wind 8 to 18 mph, with gusts as high as 30 mph.

    High: 54 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Showers. Low around 48. Southeast wind around 16 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 48 °F

    Showers
    Likely then
    Showers

  • Monday

    Monday: Showers, with thunderstorms also possible after 11am. High near 67. Breezy, with a south wind 15 to 23 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 67 °F

    Showers and
    Breezy

  • Monday Night

    Monday Night: Rain showers before 11pm, then snow showers, possibly mixed with rain between 11pm and 2am, then a slight chance of snow showers after 2am. Some thunder is also possible. Low around 26. West wind around 16 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    Low: 26 °F

    Rain/Snow

  • Tuesday

    Tuesday: Partly sunny, with a high near 34. Breezy.

    High: 34 °F

    Mostly Sunny
    then Partly
    Sunny and
    Breezy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 21.

    Low: 21 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 28.

    Low: 28 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, with a low around 34. Light and variable wind.
Sunday
Partly sunny, with a high near 54. Southeast wind 8 to 18 mph, with gusts as high as 30 mph.
Sunday Night
Showers. Low around 48. Southeast wind around 16 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Showers, with thunderstorms also possible after 11am. High near 67. Breezy, with a south wind 15 to 23 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Monday Night
Rain showers before 11pm, then snow showers, possibly mixed with rain between 11pm and 2am, then a slight chance of snow showers after 2am. Some thunder is also possible. Low around 26. West wind around 16 mph, with gusts as high as 28 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Tuesday
Partly sunny, with a high near 34. Breezy.
Tuesday Night
Mostly clear, with a low around 21.
Wednesday
Partly sunny, with a high near 39.
Wednesday Night
Mostly cloudy, with a low around 28.
Thursday
Mostly cloudy, with a high near 49.
Thursday Night
Mostly cloudy, with a low around 33.
Friday
Mostly sunny, with a high near 55.
Friday Night
Mostly cloudy, with a low around 38.
Saturday
Partly sunny, with a high near 54.
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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:
8:05 pm EDT Mar 14, 2026
Forecast Valid:
9pm EDT Mar 14, 2026-6pm EDT Mar 21, 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