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.

Fair

48°F

9°C

Humidity 44%
Wind Speed N 3 mph
Barometer 30.07 in (1018.3 mb)
Dewpoint 27°F (-3°C)
Visibility 10.00 mi
Last update 17 Oct 12:56 am EDT
Extended Forecast for

Hummelstown PA

Frost Advisory October 17, 02:00am until October 17, 09:00am
Click here for hazard details and duration
Frost Advisory

  • Overnight

    Overnight: Clear, with a low around 38. Northwest wind around 6 mph.

    Low: 38 °F

    Clear

  • Friday

    Friday: Sunny, with a high near 64. North wind 6 to 9 mph.

    High: 64 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 42. Calm wind.

    Low: 42 °F

    Mostly Clear

  • Saturday

    Saturday: Partly sunny, with a high near 69. Calm wind becoming south around 6 mph in the afternoon.

    High: 69 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 49. Southeast wind around 6 mph.

    Low: 49 °F

    Partly Cloudy

  • Sunday

    Sunday: A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 75. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 75 °F

    Slight Chance
    Showers then
    Showers
    Likely

  • Sunday Night

    Sunday Night: Showers likely, mainly before 2am. Mostly cloudy, with a low around 50. Chance of precipitation is 70%.

    Low: 50 °F

    Showers
    Likely

  • Monday

    Monday: A chance of showers before 2pm. Mostly sunny, with a high near 65. Chance of precipitation is 30%.

    High: 65 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Mostly clear, with a low around 44.

    Low: 44 °F

    Mostly Clear

Detailed Forecast

Overnight
Clear, with a low around 38. Northwest wind around 6 mph.
Friday
Sunny, with a high near 64. North wind 6 to 9 mph.
Friday Night
Mostly clear, with a low around 42. Calm wind.
Saturday
Partly sunny, with a high near 69. Calm wind becoming south around 6 mph in the afternoon.
Saturday Night
Partly cloudy, with a low around 49. Southeast wind around 6 mph.
Sunday
A slight chance of showers, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 75. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Sunday Night
Showers likely, mainly before 2am. Mostly cloudy, with a low around 50. Chance of precipitation is 70%.
Monday
A chance of showers before 2pm. Mostly sunny, with a high near 65. Chance of precipitation is 30%.
Monday Night
Mostly clear, with a low around 44.
Tuesday
Mostly sunny, with a high near 69.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 47. Chance of precipitation is 40%.
Wednesday
Mostly sunny, with a high near 61.
Wednesday Night
Partly cloudy, with a low around 44.
Thursday
Mostly sunny, with a high near 62.
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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:
8:06 pm EDT Oct 16, 2025
Forecast Valid:
1am EDT Oct 17, 2025-6pm EDT Oct 23, 2025
 
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