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

26°F

-3°C

Humidity 51%
Wind Speed NW 9 mph
Barometer 30.28 in (1025.7 mb)
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill17°F (-8°C)
Last update 18 Mar 1:56 am EDT
Extended Forecast for

Hummelstown PA

  • Overnight

    Overnight: Mostly clear, with a low around 23. Northwest wind around 6 mph.

    Low: 23 °F

    Mostly Clear

  • Wednesday

    Wednesday: Increasing clouds, with a high near 40. Calm wind becoming south around 6 mph in the afternoon.

    High: 40 °F

    Increasing
    Clouds

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 28. Southeast wind 3 to 5 mph.

    Low: 28 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 49. South wind 5 to 8 mph.

    High: 49 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 34. Light southeast wind.

    Low: 34 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of rain after 2pm. Partly sunny, with a high near 56. Chance of precipitation is 20%.

    High: 56 °F

    Partly Sunny
    then Slight
    Chance Rain

  • Friday Night

    Friday Night: Showers likely, mainly after 2am. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.

    Low: 44 °F

    Showers
    Likely

  • Saturday

    Saturday: Showers likely before 8am. Partly sunny, with a high near 61. Chance of precipitation is 60%.

    High: 61 °F

    Showers
    Likely then
    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 43.

    Low: 43 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 23. Northwest wind around 6 mph.
Wednesday
Increasing clouds, with a high near 40. Calm wind becoming south around 6 mph in the afternoon.
Wednesday Night
Mostly cloudy, with a low around 28. Southeast wind 3 to 5 mph.
Thursday
Partly sunny, with a high near 49. South wind 5 to 8 mph.
Thursday Night
Mostly cloudy, with a low around 34. Light southeast wind.
Friday
A slight chance of rain after 2pm. Partly sunny, with a high near 56. Chance of precipitation is 20%.
Friday Night
Showers likely, mainly after 2am. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.
Saturday
Showers likely before 8am. Partly sunny, with a high near 61. Chance of precipitation is 60%.
Saturday Night
Mostly cloudy, with a low around 43.
Sunday
A chance of showers after 2pm. Mostly cloudy, with a high near 65. Chance of precipitation is 30%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 39. Chance of precipitation is 40%.
Monday
Mostly sunny, with a high near 50.
Monday Night
Mostly clear, with a low around 28.
Tuesday
Mostly sunny, with a high near 47.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hummelstown PA
 40.26°N 76.7°W (Elev. 427 ft)
Last Update:
2:21 am EDT Mar 18, 2026
Forecast Valid:
2am EDT Mar 18, 2026-6pm EDT Mar 24, 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