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.

Overcast

31°F

-1°C

Humidity 52%
Wind Speed SW 14 G 21 mph
Barometer 29.77 in (1008.7 mb)
Dewpoint 15°F (-9°C)
Visibility 10.00 mi
Wind Chill21°F (-6°C)
Last update 31 Dec 5:56 pm EST
Extended Forecast for

Hummelstown PA

  • Tonight

    Tonight: A slight chance of snow showers before 1am, then a chance of snow showers after 2am. Mostly cloudy, with a low around 23. Southwest wind 8 to 14 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 30%.

    Low: 23 °F

    Chance Snow
    Showers

  • New Year's Day

    New Year's Day: Mostly sunny, with a high near 29. Northwest wind 14 to 16 mph, with gusts as high as 26 mph.

    High: 29 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 19. West wind 6 to 9 mph.

    Low: 19 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 34. West wind 6 to 10 mph.

    High: 34 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 21. West wind around 6 mph.

    Low: 21 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 35.

    High: 35 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 37.

    High: 37 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 20.

    Low: 20 °F

    Mostly Cloudy

Detailed Forecast

Tonight
A slight chance of snow showers before 1am, then a chance of snow showers after 2am. Mostly cloudy, with a low around 23. Southwest wind 8 to 14 mph becoming northwest after midnight. Winds could gust as high as 24 mph. Chance of precipitation is 30%.
New Year's Day
Mostly sunny, with a high near 29. Northwest wind 14 to 16 mph, with gusts as high as 26 mph.
Thursday Night
Partly cloudy, with a low around 19. West wind 6 to 9 mph.
Friday
Partly sunny, with a high near 34. West wind 6 to 10 mph.
Friday Night
Partly cloudy, with a low around 21. West wind around 6 mph.
Saturday
Partly sunny, with a high near 35.
Saturday Night
Mostly cloudy, with a low around 23.
Sunday
Mostly sunny, with a high near 37.
Sunday Night
Mostly cloudy, with a low around 20.
Monday
Mostly cloudy, with a high near 36.
Monday Night
Mostly cloudy, with a low around 26.
Tuesday
Mostly cloudy, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 31.
Wednesday
A chance of showers. Mostly cloudy, with a high near 46. Chance of precipitation is 30%.
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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:
2:09 pm EST Dec 31, 2025
Forecast Valid:
6pm EST Dec 31, 2025-6pm EST Jan 7, 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