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.

Light Snow Fog/Mist

34°F

1°C

Humidity 97%
Wind Speed W 17 mph
Barometer 29.52 in (1000.0 mb)
Dewpoint 33°F (1°C)
Visibility 5.00 mi
Wind Chill23°F (-5°C)
Last update 16 Mar 11:56 pm EDT
Extended Forecast for

Hummelstown PA

  • Overnight

    Overnight: A chance of snow before 2am. Cloudy, then gradually becoming partly cloudy, with a low around 27. Breezy, with a west wind 17 to 20 mph, with gusts as high as 36 mph. Chance of precipitation is 50%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 27 °F

    Chance Snow
    and Breezy

  • Tuesday

    Tuesday: Increasing clouds, with a high near 37. West wind 15 to 18 mph, with gusts as high as 29 mph.

    High: 37 °F

    Increasing
    Clouds

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 22. West wind 5 to 10 mph, with gusts as high as 20 mph.

    Low: 22 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 39. Southwest wind 3 to 7 mph.

    High: 39 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 28. South wind around 6 mph.

    Low: 28 °F

    Mostly Cloudy

  • Thursday

    Thursday: Mostly cloudy, with a high near 46.

    High: 46 °F

    Mostly Cloudy

  • Thursday Night

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

    Low: 34 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of rain after 2pm. Mostly cloudy, with a high near 55. Chance of precipitation is 30%.

    High: 55 °F

    Mostly Cloudy
    then Chance
    Rain

  • Friday Night

    Friday Night: A chance of rain. Mostly cloudy, with a low around 38. Chance of precipitation is 40%.

    Low: 38 °F

    Chance Rain

Detailed Forecast

Overnight
A chance of snow before 2am. Cloudy, then gradually becoming partly cloudy, with a low around 27. Breezy, with a west wind 17 to 20 mph, with gusts as high as 36 mph. Chance of precipitation is 50%. Total nighttime snow accumulation of less than a half inch possible.
Tuesday
Increasing clouds, with a high near 37. West wind 15 to 18 mph, with gusts as high as 29 mph.
Tuesday Night
Mostly clear, with a low around 22. West wind 5 to 10 mph, with gusts as high as 20 mph.
Wednesday
Partly sunny, with a high near 39. Southwest wind 3 to 7 mph.
Wednesday Night
Mostly cloudy, with a low around 28. South wind around 6 mph.
Thursday
Mostly cloudy, with a high near 46.
Thursday Night
Mostly cloudy, with a low around 34.
Friday
A chance of rain after 2pm. Mostly cloudy, with a high near 55. Chance of precipitation is 30%.
Friday Night
A chance of rain. Mostly cloudy, with a low around 38. Chance of precipitation is 40%.
Saturday
A chance of rain. Partly sunny, with a high near 54. Chance of precipitation is 30%.
Saturday Night
Mostly cloudy, with a low around 38.
Sunday
Partly sunny, with a high near 57.
Sunday Night
Mostly cloudy, with a low around 34.
Monday
Partly sunny, with a high near 49.
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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:
10:11 pm EDT Mar 16, 2026
Forecast Valid:
12am EDT Mar 17, 2026-6pm EDT Mar 23, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation