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Current conditions at

Harrisburg, Harrisburg International Airport (KMDT)

Lat: 40.19°NLon: 76.76°WElev: 312ft.

Fair

9°F

-13°C

Humidity 77%
Wind Speed E 3 mph
Barometer 30.49 in (1033.1 mb)
Dewpoint 3°F (-16°C)
Visibility 10.00 mi
Last update 21 Jan 4:56 am EST
Extended Forecast for

Hummelstown PA

  • Today

    Today: Increasing clouds, with a high near 35. Light south wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 25 mph.

    High: 35 °F

    Increasing
    Clouds

  • Tonight

    Tonight: Cloudy, then gradually becoming partly cloudy, with a low around 30. South wind around 10 mph, with gusts as high as 20 mph.

    Low: 30 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 43. West wind 10 to 18 mph, with gusts as high as 31 mph.

    High: 43 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 23. West wind around 6 mph.

    Low: 23 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 33. West wind 6 to 16 mph, with gusts as high as 25 mph.

    High: 33 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 7.

    Low: 7 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 17.

    High: 17 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Snow likely, mainly after 1am. Mostly cloudy, with a low around 10. Chance of precipitation is 60%.

    Low: 10 °F

    Snow Likely

  • Sunday

    Sunday: Snow. High near 18. Chance of precipitation is 80%.

    High: 18 °F

    Snow

Detailed Forecast

Today
Increasing clouds, with a high near 35. Light south wind increasing to 10 to 15 mph in the morning. Winds could gust as high as 25 mph.
Tonight
Cloudy, then gradually becoming partly cloudy, with a low around 30. South wind around 10 mph, with gusts as high as 20 mph.
Thursday
Mostly sunny, with a high near 43. West wind 10 to 18 mph, with gusts as high as 31 mph.
Thursday Night
Partly cloudy, with a low around 23. West wind around 6 mph.
Friday
Partly sunny, with a high near 33. West wind 6 to 16 mph, with gusts as high as 25 mph.
Friday Night
Partly cloudy, with a low around 7.
Saturday
Partly sunny, with a high near 17.
Saturday Night
Snow likely, mainly after 1am. Mostly cloudy, with a low around 10. Chance of precipitation is 60%.
Sunday
Snow. High near 18. Chance of precipitation is 80%.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 11. Chance of precipitation is 50%.
Monday
Partly sunny, with a high near 24.
Monday Night
Mostly clear, with a low around 4.
Tuesday
Mostly sunny, with a high near 24.
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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:
2:26 am EST Jan 21, 2026
Forecast Valid:
5am EST Jan 21, 2026-6pm EST Jan 27, 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