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.

Fair

63°F

17°C

Humidity 78%
Wind Speed E 5 mph
Barometer 30.03 in (1016.6 mb)
Dewpoint 56°F (13°C)
Visibility 10.00 mi
Last update 2 Sep 10:56 pm EDT
Extended Forecast for

3 Miles SSW Hummelstown PA

  • Tonight

    Tonight: Mostly clear, with a low around 55. Calm wind.

    Low: 55 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 81. Calm wind becoming south around 5 mph in the afternoon.

    High: 81 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 60. Southeast wind around 6 mph.

    Low: 60 °F

    Mostly Clear

  • Thursday

    Thursday: Showers likely and possibly a thunderstorm after 2pm. Sunny, then becoming mostly cloudy during the afternoon, with a high near 85. South wind 6 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Mostly Sunny
    then Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 11pm, then showers likely between 11pm and 2am. Mostly cloudy, with a low around 62. South wind 3 to 8 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 62 °F

    Showers
    Likely

  • Friday

    Friday: Mostly sunny, with a high near 85.

    High: 85 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 64.

    Low: 64 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of showers after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 50%.

    High: 82 °F

    Mostly Sunny
    then Chance
    Showers

  • Saturday Night

    Saturday Night: A chance of showers before 8pm. Mostly cloudy, with a low around 55. Chance of precipitation is 30%.

    Low: 55 °F

    Chance
    Showers then
    Partly Cloudy

Detailed Forecast

Tonight
Mostly clear, with a low around 55. Calm wind.
Wednesday
Sunny, with a high near 81. Calm wind becoming south around 5 mph in the afternoon.
Wednesday Night
Mostly clear, with a low around 60. Southeast wind around 6 mph.
Thursday
Showers likely and possibly a thunderstorm after 2pm. Sunny, then becoming mostly cloudy during the afternoon, with a high near 85. South wind 6 to 14 mph, with gusts as high as 23 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely and possibly a thunderstorm before 11pm, then showers likely between 11pm and 2am. Mostly cloudy, with a low around 62. South wind 3 to 8 mph. Chance of precipitation is 60%. New precipitation amounts between a quarter and half of an inch possible.
Friday
Mostly sunny, with a high near 85.
Friday Night
Partly cloudy, with a low around 64.
Saturday
A chance of showers after 2pm. Partly sunny, with a high near 82. Chance of precipitation is 50%.
Saturday Night
A chance of showers before 8pm. Mostly cloudy, with a low around 55. Chance of precipitation is 30%.
Sunday
Mostly sunny, with a high near 75.
Sunday Night
Mostly clear, with a low around 50.
Monday
Sunny, with a high near 75.
Monday Night
Partly cloudy, with a low around 52.
Tuesday
Mostly sunny, with a high near 75.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
3 Miles SSW Hummelstown PA
 40.24°N 76.73°W (Elev. 305 ft)
Last Update:
2:27 pm EDT Sep 2, 2025
Forecast Valid:
11pm EDT Sep 2, 2025-6pm EDT Sep 9, 2025
 
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Additional Resources

Radar & Satellite Image

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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