Current conditions at

Harrisburg, Harrisburg International Airport (KMDT)

Lat: 40.19°NLon: 76.76°WElev: 312ft.

Partly Cloudy

19°F

-7°C

Humidity 68%
Wind Speed W 9 mph
Barometer 29.95 in (1014.7 mb)
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill8°F (-13°C)
Last update 18 Jan 9:56 pm EST
Extended Forecast for

Hummelstown PA

  • Tonight

    Tonight: Increasing clouds, with a low around 18. West wind 3 to 6 mph.

    Low: 18 °F

    Increasing
    Clouds

  • M.L.King Day

    M.L.King Day: Increasing clouds, with a high near 34. Breezy, with a light south wind becoming west 16 to 21 mph in the morning. Winds could gust as high as 38 mph.

    High: 34 °F

    Mostly Sunny
    then Partly
    Sunny and
    Breezy

  • Monday Night

    Monday Night: Mostly clear, with a low around 11. Wind chill values as low as zero. West wind 10 to 18 mph, with gusts as high as 32 mph.

    Low: 11 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 22. Wind chill values as low as zero. West wind 10 to 14 mph, with gusts as high as 28 mph.

    High: 22 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 8. West wind around 6 mph becoming calm  in the evening.

    Low: 8 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 33.

    High: 33 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 38.

    High: 38 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

Detailed Forecast

Tonight
Increasing clouds, with a low around 18. West wind 3 to 6 mph.
M.L.King Day
Increasing clouds, with a high near 34. Breezy, with a light south wind becoming west 16 to 21 mph in the morning. Winds could gust as high as 38 mph.
Monday Night
Mostly clear, with a low around 11. Wind chill values as low as zero. West wind 10 to 18 mph, with gusts as high as 32 mph.
Tuesday
Sunny, with a high near 22. Wind chill values as low as zero. West wind 10 to 14 mph, with gusts as high as 28 mph.
Tuesday Night
Mostly clear, with a low around 8. West wind around 6 mph becoming calm in the evening.
Wednesday
Mostly sunny, with a high near 33.
Wednesday Night
Mostly cloudy, with a low around 27.
Thursday
Partly sunny, with a high near 38.
Thursday Night
Partly cloudy, with a low around 16.
Friday
Mostly sunny, with a high near 31.
Friday Night
Mostly cloudy, with a low around 18.
Saturday
A chance of snow showers. Partly sunny, with a high near 28. Chance of precipitation is 30%.
Saturday Night
A chance of snow showers. Mostly cloudy, with a low around 12. Chance of precipitation is 30%.
Sunday
A chance of snow showers. Partly sunny, with a high near 21. Chance of precipitation is 40%.
Basemap Options
Click map to change the forecast location
Loading map...

ABOUT THIS FORECAST

 
Point Forecast:
Hummelstown PA
 40.26°N 76.7°W (Elev. 427 ft)
10:46 pm EST Jan 18, 2026
10pm EST Jan 18, 2026-6pm EST Jan 25, 2026
 
Get as KML Get as XML

Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database