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.

Light Rain Fog/Mist

45°F

7°C

Humidity 97%
Wind Speed W 3 mph
Barometer 29.86 in (1011.4 mb)
Dewpoint 44°F (7°C)
Visibility 2.00 mi
Last update 22 Nov 1:56 am EST
Extended Forecast for

Hummelstown PA

  • Overnight

    Overnight: Showers, mainly before 5am. Patchy fog. Low around 45. Calm wind. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 45 °F

    Showers and
    Patchy Fog

  • Saturday

    Saturday: A chance of showers, mainly before 8am. Patchy fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 55. North wind 3 to 8 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    High: 55 °F

    Chance
    Showers and
    Patchy Fog
    then Mostly
    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 32. Light northwest wind.

    Low: 32 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 54. Light and variable wind becoming west 5 to 10 mph in the morning.

    High: 54 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 34. West wind 7 to 9 mph.

    Low: 34 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 54.

    High: 54 °F

    Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 36.

    Low: 36 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of showers after 1pm. Cloudy, with a high near 54. Chance of precipitation is 40%.

    High: 54 °F

    Mostly Cloudy
    then Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers likely before 1am. Mostly cloudy, with a low around 47. Chance of precipitation is 60%.

    Low: 47 °F

    Showers
    Likely

Detailed Forecast

Overnight
Showers, mainly before 5am. Patchy fog. Low around 45. Calm wind. Chance of precipitation is 90%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
A chance of showers, mainly before 8am. Patchy fog before 10am. Otherwise, cloudy, then gradually becoming mostly sunny, with a high near 55. North wind 3 to 8 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Saturday Night
Partly cloudy, with a low around 32. Light northwest wind.
Sunday
Mostly sunny, with a high near 54. Light and variable wind becoming west 5 to 10 mph in the morning.
Sunday Night
Mostly clear, with a low around 34. West wind 7 to 9 mph.
Monday
Sunny, with a high near 54.
Monday Night
Mostly cloudy, with a low around 36.
Tuesday
A chance of showers after 1pm. Cloudy, with a high near 54. Chance of precipitation is 40%.
Tuesday Night
Showers likely before 1am. Mostly cloudy, with a low around 47. Chance of precipitation is 60%.
Wednesday
A chance of showers before 1pm. Mostly cloudy, with a high near 62. Chance of precipitation is 30%.
Wednesday Night
Mostly cloudy, with a low around 38.
Thanksgiving Day
Partly sunny, with a high near 48.
Thursday Night
Partly cloudy, with a low around 30.
Friday
Mostly sunny, with a high near 44.
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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:
1:05 am EST Nov 22, 2025
Forecast Valid:
2am EST Nov 22, 2025-6pm EST Nov 28, 2025
 
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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