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

67°F

19°C

Humidity 91%
Wind Speed Calm
Barometer 30.09 in (1018.8 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Last update 25 May 9:56 pm EDT
Extended Forecast for

Hallam PA

  • Tonight

    Tonight: Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 57. Calm wind.

    Low: 57 °F

    Mostly Cloudy
    then Patchy
    Fog

  • Tuesday

    Tuesday: Patchy fog before 7am. Otherwise, partly sunny, with a high near 78. Calm wind.

    High: 78 °F

    Patchy Fog
    then Partly
    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers after 2am. Mostly cloudy, with a low around 63. Light south wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 63 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 79. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 79 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 61. West wind around 5 mph becoming northwest after midnight.

    Low: 61 °F

    Mostly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 76.

    High: 76 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 54.

    Low: 54 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 74.

    High: 74 °F

    Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 53.

    Low: 53 °F

    Mostly Clear

Detailed Forecast

Tonight
Patchy fog after 2am. Otherwise, mostly cloudy, with a low around 57. Calm wind.
Tuesday
Patchy fog before 7am. Otherwise, partly sunny, with a high near 78. Calm wind.
Tuesday Night
A chance of showers after 2am. Mostly cloudy, with a low around 63. Light south wind. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A chance of showers, with thunderstorms also possible after 5pm. Mostly cloudy, with a high near 79. Calm wind becoming west around 5 mph in the afternoon. Chance of precipitation is 40%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Mostly cloudy, with a low around 61. West wind around 5 mph becoming northwest after midnight.
Thursday
Sunny, with a high near 76.
Thursday Night
Mostly clear, with a low around 54.
Friday
Sunny, with a high near 74.
Friday Night
Mostly clear, with a low around 53.
Saturday
Sunny, with a high near 71.
Saturday Night
Partly cloudy, with a low around 52.
Sunday
Mostly sunny, with a high near 70.
Sunday Night
Mostly clear, with a low around 53.
Monday
Sunny, with a high near 73.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hallam PA
 40°N 76.57°W (Elev. 486 ft)
Last Update:
9:06 pm EDT May 25, 2026
Forecast Valid:
10pm EDT May 25, 2026-6pm EDT Jun 1, 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