National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Areas of Severe Thunderstorms, Excessive Rainfall, and Extreme Heat Saturday

Severe thunderstorms capable of damaging winds will be possible from the Ozark Plateau east into the Tennessee Valley Saturday. Rounds of heavy thunderstorms ahead of a slow moving front will continue locally heavy rainfall and scattered flash flooding potential from the Ozarks to the Ohio and Tennessee Valleys Saturday. Extreme heat will continue for the Intermountain West and Plains. Read More >

Current conditions at

Harrisburg, Harrisburg International Airport (KMDT)

Lat: 40.19°NLon: 76.76°WElev: 312ft.

Overcast

71°F

22°C

Humidity 94%
Wind Speed Calm
Barometer 29.92 in (1012.9 mb)
Dewpoint 69°F (21°C)
Visibility 10.00 mi
Last update 11 Jul 1:56 am EDT
Extended Forecast for

Hummelstown PA

  • Overnight

    Overnight: Mostly cloudy, with a low around 68. Calm wind.

    Low: 68 °F

    Mostly Cloudy

  • Saturday

    Saturday: A slight chance of showers between 7am and noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 85. North wind 3 to 6 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 64. Light and variable wind.

    Low: 64 °F

    Partly Cloudy

  • Sunday

    Sunday: Sunny, with a high near 85. Calm wind becoming east around 5 mph in the afternoon.

    High: 85 °F

    Sunny

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 64. Light southeast wind.

    Low: 64 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 86.

    High: 86 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 64.

    Low: 64 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny and hot, with a high near 92.

    High: 92 °F

    Hot

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 72.

    Low: 72 °F

    Mostly Clear

Detailed Forecast

Overnight
Mostly cloudy, with a low around 68. Calm wind.
Saturday
A slight chance of showers between 7am and noon, then a chance of showers and thunderstorms after noon. Mostly cloudy, with a high near 85. North wind 3 to 6 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Partly cloudy, with a low around 64. Light and variable wind.
Sunday
Sunny, with a high near 85. Calm wind becoming east around 5 mph in the afternoon.
Sunday Night
Partly cloudy, with a low around 64. Light southeast wind.
Monday
Mostly sunny, with a high near 86.
Monday Night
Mostly clear, with a low around 64.
Tuesday
Sunny and hot, with a high near 92.
Tuesday Night
Mostly clear, with a low around 72.
Wednesday
Sunny and hot, with a high near 96.
Wednesday Night
Mostly clear, with a low around 72.
Thursday
Mostly sunny and hot, with a high near 92.
Thursday Night
Partly cloudy, with a low around 69.
Friday
Sunny, with a high near 91.
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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:
8:10 pm EDT Jul 10, 2026
Forecast Valid:
2am EDT Jul 11, 2026-6pm EDT Jul 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