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.

A Few Clouds and Breezy

44°F

7°C

Humidity 49%
Wind Speed NW 21 G 29 mph
Barometer 30.23 in (1024.0 mb)
Dewpoint 26°F (-3°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 24 Dec 9:56 am EST
Extended Forecast for

Hummelstown PA

Winter Storm Watch December 26, 07:00am until December 27, 07:00am
Click here for hazard details and duration
Winter Storm Watch

  • Today

    Today: Sunny, with a high near 44. Northwest wind 7 to 16 mph, with gusts as high as 30 mph.

    High: 44 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 31. Calm wind.

    Low: 31 °F

    Mostly Cloudy

  • Christmas Day

    Christmas Day: Mostly cloudy, with a high near 46. South wind 5 to 10 mph becoming northwest in the afternoon.

    High: 46 °F

    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 24. North wind 5 to 10 mph.

    Low: 24 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of snow before 1pm, then snow and freezing rain likely. Cloudy, with a high near 31. North wind 5 to 10 mph becoming southeast in the afternoon. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.

    High: 31 °F

    Slight Chance
    Snow then
    Wintry Mix
    Likely

  • Friday Night

    Friday Night: Snow and freezing rain, possibly mixed with sleet before 1am, then freezing rain likely between 1am and 4am, then snow and freezing rain likely after 4am. Low around 27. Chance of precipitation is 100%. New snow and sleet accumulation of less than one inch possible.

    Low: 27 °F

    Wintry Mix

  • Saturday

    Saturday: Snow likely before 7am. Cloudy, with a high near 37. Chance of precipitation is 60%.

    High: 37 °F

    Snow Likely
    then Cloudy

  • Saturday Night

    Saturday Night: Cloudy, with a low around 30.

    Low: 30 °F

    Cloudy

  • Sunday

    Sunday: Rain likely, mainly after 1pm. Cloudy, with a high near 41. Chance of precipitation is 70%.

    High: 41 °F

    Rain Likely

Detailed Forecast

Today
Sunny, with a high near 44. Northwest wind 7 to 16 mph, with gusts as high as 30 mph.
Tonight
Mostly cloudy, with a low around 31. Calm wind.
Christmas Day
Mostly cloudy, with a high near 46. South wind 5 to 10 mph becoming northwest in the afternoon.
Thursday Night
Mostly cloudy, with a low around 24. North wind 5 to 10 mph.
Friday
A slight chance of snow before 1pm, then snow and freezing rain likely. Cloudy, with a high near 31. North wind 5 to 10 mph becoming southeast in the afternoon. Chance of precipitation is 70%. New snow accumulation of 1 to 2 inches possible.
Friday Night
Snow and freezing rain, possibly mixed with sleet before 1am, then freezing rain likely between 1am and 4am, then snow and freezing rain likely after 4am. Low around 27. Chance of precipitation is 100%. New snow and sleet accumulation of less than one inch possible.
Saturday
Snow likely before 7am. Cloudy, with a high near 37. Chance of precipitation is 60%.
Saturday Night
Cloudy, with a low around 30.
Sunday
Rain likely, mainly after 1pm. Cloudy, with a high near 41. Chance of precipitation is 70%.
Sunday Night
Rain likely, mainly before 1am. Mostly cloudy, with a low around 28. Chance of precipitation is 60%.
Monday
Partly sunny, with a high near 34. Breezy.
Monday Night
Mostly cloudy, with a low around 19.
Tuesday
Partly sunny, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hummelstown PA
 40.26°N 76.7°W (Elev. 427 ft)
Last Update:
7:16 am EST Dec 24, 2025
Forecast Valid:
10am EST Dec 24, 2025-6pm EST Dec 30, 2025
 
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