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.

Overcast

48°F

9°C

Humidity 89%
Wind Speed E 12 mph
Barometer 29.90 in (1012.5 mb)
Dewpoint 45°F (7°C)
Visibility 10.00 mi
Wind Chill43°F (6°C)
Last update 16 Mar 12:56 am EDT
Extended Forecast for

Hummelstown PA

  • Overnight

    Overnight: Showers, mainly before 4am. Low around 49. Southeast wind around 16 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 49 °F

    Showers

  • Monday

    Monday: Showers and thunderstorms before 4pm, then showers and possibly a thunderstorm, mainly after 4pm. Some of the storms could be severe and produce heavy rainfall. High near 69. Breezy, with a south wind 14 to 23 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 69 °F

    Severe
    Thunderstorms
    and Breezy

  • Monday Night

    Monday Night: Rain showers, mixing with snow after 11pm, then gradually ending. The rain could be heavy at times. Some thunder is also possible. Low around 27. West wind 15 to 18 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 27 °F

    Rain/Snow

  • Tuesday

    Tuesday: Partly sunny, with a high near 36. West wind 15 to 18 mph, with gusts as high as 28 mph.

    High: 36 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 22. West wind 6 to 13 mph, with gusts as high as 21 mph.

    Low: 22 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 39.

    High: 39 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 26.

    Low: 26 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 47.

    High: 47 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 34.

    Low: 34 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Showers, mainly before 4am. Low around 49. Southeast wind around 16 mph, with gusts as high as 29 mph. Chance of precipitation is 100%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Showers and thunderstorms before 4pm, then showers and possibly a thunderstorm, mainly after 4pm. Some of the storms could be severe and produce heavy rainfall. High near 69. Breezy, with a south wind 14 to 23 mph, with gusts as high as 40 mph. Chance of precipitation is 80%. New rainfall amounts between a half and three quarters of an inch possible.
Monday Night
Rain showers, mixing with snow after 11pm, then gradually ending. The rain could be heavy at times. Some thunder is also possible. Low around 27. West wind 15 to 18 mph, with gusts as high as 44 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Tuesday
Partly sunny, with a high near 36. West wind 15 to 18 mph, with gusts as high as 28 mph.
Tuesday Night
Partly cloudy, with a low around 22. West wind 6 to 13 mph, with gusts as high as 21 mph.
Wednesday
Mostly sunny, with a high near 39.
Wednesday Night
Mostly cloudy, with a low around 26.
Thursday
Partly sunny, with a high near 47.
Thursday Night
Mostly cloudy, with a low around 34.
Friday
Partly sunny, with a high near 55.
Friday Night
A chance of showers. Mostly cloudy, with a low around 39. Chance of precipitation is 40%.
Saturday
Mostly cloudy, with a high near 57.
Saturday Night
Mostly cloudy, with a low around 37.
Sunday
Partly sunny, with a high near 54.
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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:
1:01 am EDT Mar 16, 2026
Forecast Valid:
1am EDT Mar 16, 2026-6pm EDT Mar 22, 2026
 
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