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.

Light Rain Fog/Mist

46°F

8°C

Humidity 93%
Wind Speed SE 3 mph
Barometer 30.04 in (1017.5 mb)
Dewpoint 44°F (7°C)
Visibility 4.00 mi
Last update 9 Jan 3:56 pm EST
Extended Forecast for

Hummelstown PA

  • This Afternoon

    This Afternoon: Showers likely, mainly before 5pm. Cloudy, with a high near 52. South wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 52 °F

    Showers
    Likely

  • Tonight

    Tonight: Mostly cloudy, with a low around 39. Southwest wind 5 to 10 mph becoming northwest after midnight.

    Low: 39 °F

    Mostly Cloudy

  • Saturday

    Saturday: Rain, mainly before 5pm. High near 44. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    High: 44 °F

    Chance Rain
    then Rain

  • Saturday Night

    Saturday Night: Rain likely, mainly between 7pm and 1am. Patchy dense fog before 2am. Otherwise, cloudy, with a low around 36. Light and variable wind becoming west 5 to 9 mph after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 36 °F

    Rain Likely
    and Patchy
    Dense Fog

  • Sunday

    Sunday: A slight chance of rain and snow showers after 1pm. Mostly sunny, with a high near 41. Breezy, with a west wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 20%.

    High: 41 °F

    Mostly Sunny
    then Slight
    Chance
    Rain/Snow and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 28.

    Low: 28 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 41.

    High: 41 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 47.

    High: 47 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
Showers likely, mainly before 5pm. Cloudy, with a high near 52. South wind around 11 mph, with gusts as high as 22 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Mostly cloudy, with a low around 39. Southwest wind 5 to 10 mph becoming northwest after midnight.
Saturday
Rain, mainly before 5pm. High near 44. Calm wind becoming east around 6 mph in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Saturday Night
Rain likely, mainly between 7pm and 1am. Patchy dense fog before 2am. Otherwise, cloudy, with a low around 36. Light and variable wind becoming west 5 to 9 mph after midnight. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
A slight chance of rain and snow showers after 1pm. Mostly sunny, with a high near 41. Breezy, with a west wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 38 mph. Chance of precipitation is 20%.
Sunday Night
Partly cloudy, with a low around 28.
Monday
Mostly sunny, with a high near 41.
Monday Night
Partly cloudy, with a low around 29.
Tuesday
Mostly sunny, with a high near 47.
Tuesday Night
Mostly cloudy, with a low around 35.
Wednesday
Mostly cloudy, with a high near 47.
Wednesday Night
Mostly cloudy, with a low around 28.
Thursday
Partly sunny, with a high near 36.
Thursday Night
Mostly cloudy, with a low around 20.
Friday
Mostly sunny, with a high near 33.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hummelstown PA
 40.26°N 76.7°W (Elev. 427 ft)
Last Update:
3:56 pm EST Jan 9, 2026
Forecast Valid:
4pm EST Jan 9, 2026-6pm EST Jan 16, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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