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.

Fog/Mist

40°F

4°C

Humidity 97%
Wind Speed NW 5 mph
Barometer 29.81 in (1009.8 mb)
Dewpoint 39°F (4°C)
Visibility 2.00 mi
Wind Chill36°F (2°C)
Last update 11 Jan 1:56 am EST
Extended Forecast for

Hummelstown PA

  • Overnight

    Overnight: Mostly cloudy, with a low around 33. West wind 7 to 10 mph, with gusts as high as 22 mph.

    Low: 33 °F

    Mostly Cloudy

  • Sunday

    Sunday: Scattered rain and snow showers between 1pm and 3pm. The snow could be heavy at times. Mostly sunny, with a high near 43. Breezy, with a west wind 9 to 14 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 43 °F

    Sunny then
    Scattered
    Rain/Snow and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 28. Breezy, with a west wind 15 to 21 mph, with gusts as high as 36 mph.

    Low: 28 °F

    Partly Cloudy
    and Breezy
    then Mostly
    Clear

  • Monday

    Monday: Mostly sunny, with a high near 43. Southwest wind around 11 mph, with gusts as high as 21 mph.

    High: 43 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 28. West wind around 6 mph.

    Low: 28 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Cloudy, with a low around 37.

    Low: 37 °F

    Cloudy

  • Wednesday

    Wednesday: A chance of showers. Mostly cloudy, with a high near 49. Chance of precipitation is 30%.

    High: 49 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers. Mostly cloudy, with a low around 29. Chance of precipitation is 30%.

    Low: 29 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 33. West wind 7 to 10 mph, with gusts as high as 22 mph.
Sunday
Scattered rain and snow showers between 1pm and 3pm. The snow could be heavy at times. Mostly sunny, with a high near 43. Breezy, with a west wind 9 to 14 mph increasing to 17 to 22 mph in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Sunday Night
Partly cloudy, with a low around 28. Breezy, with a west wind 15 to 21 mph, with gusts as high as 36 mph.
Monday
Mostly sunny, with a high near 43. Southwest wind around 11 mph, with gusts as high as 21 mph.
Monday Night
Partly cloudy, with a low around 28. West wind around 6 mph.
Tuesday
Mostly sunny, with a high near 47.
Tuesday Night
Cloudy, with a low around 37.
Wednesday
A chance of showers. Mostly cloudy, with a high near 49. Chance of precipitation is 30%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 29. Chance of precipitation is 30%.
Thursday
A chance of rain and snow showers before 1pm. Partly sunny, with a high near 35. Chance of precipitation is 30%.
Thursday Night
Mostly cloudy, with a low around 20.
Friday
Partly sunny, with a high near 34.
Friday Night
Mostly cloudy, with a low around 21.
Saturday
Mostly sunny, with a high near 37.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hummelstown PA
 40.26°N 76.73°W (Elev. 335 ft)
Last Update:
1:06 am EST Jan 11, 2026
Forecast Valid:
2am EST Jan 11, 2026-6pm EST Jan 17, 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