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.

Fog

38°F

3°C

Humidity 100%
Wind Speed E 3 mph
Barometer 29.58 in (1002.0 mb)
Dewpoint 38°F (3°C)
Visibility 0.50 mi
Last update 29 Dec 2:56 am EST
Extended Forecast for

Hummelstown PA

Wind Advisory December 29, 09:00am until December 30, 12:00pm
Click here for hazard details and duration
Wind Advisory

  • Overnight

    Overnight: A chance of showers after 4am. Cloudy, with a steady temperature around 49. South wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 49 °F

    Chance
    Showers

  • Monday

    Monday: Showers likely, mainly before 7am. Cloudy, then gradually becoming mostly sunny, with a temperature rising to near 51 by 9am, then falling to around 34 during the remainder of the day. Breezy, with a west wind 14 to 19 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 49 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 51 °F⇓

    Breezy.
    Showers
    Likely then
    Mostly Sunny

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 25. Breezy, with a west wind around 23 mph, with gusts as high as 44 mph.

    Low: 25 °F

    Mostly Cloudy
    and Breezy

  • Tuesday

    Tuesday: Partly sunny, with a high near 32. Breezy, with a west wind 22 to 24 mph, with gusts as high as 45 mph.

    High: 32 °F

    Partly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 24. West wind 10 to 16 mph, with gusts as high as 25 mph.

    Low: 24 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Mostly cloudy, with a high near 37.

    High: 37 °F

    Mostly Cloudy

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 21.

    Low: 21 °F

    Mostly Cloudy

  • New Year's Day

    New Year's Day: Mostly sunny, with a high near 28.

    High: 28 °F

    Mostly Sunny

  • Thursday Night

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

    Low: 16 °F

    Partly Cloudy

Detailed Forecast

Overnight
A chance of showers after 4am. Cloudy, with a steady temperature around 49. South wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers likely, mainly before 7am. Cloudy, then gradually becoming mostly sunny, with a temperature rising to near 51 by 9am, then falling to around 34 during the remainder of the day. Breezy, with a west wind 14 to 19 mph increasing to 20 to 25 mph in the afternoon. Winds could gust as high as 49 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Mostly cloudy, with a low around 25. Breezy, with a west wind around 23 mph, with gusts as high as 44 mph.
Tuesday
Partly sunny, with a high near 32. Breezy, with a west wind 22 to 24 mph, with gusts as high as 45 mph.
Tuesday Night
Mostly cloudy, with a low around 24. West wind 10 to 16 mph, with gusts as high as 25 mph.
Wednesday
Mostly cloudy, with a high near 37.
Wednesday Night
Mostly cloudy, with a low around 21.
New Year's Day
Mostly sunny, with a high near 28.
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
Partly sunny, with a high near 34.
Saturday Night
Mostly cloudy, with a low around 21.
Sunday
Mostly sunny, with a high near 33.
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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:
1:01 am EST Dec 29, 2025
Forecast Valid:
3am EST Dec 29, 2025-6pm EST Jan 4, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation