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 Snow

30°F

-1°C

Humidity 72%
Wind Speed NW 13 mph
Barometer 29.95 in (1014.5 mb)
Dewpoint 22°F (-6°C)
Visibility 10.00 mi
Wind Chill20°F (-7°C)
Last update 18 Jan 1:56 pm EST
Extended Forecast for

Hallam PA

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 17. West wind 3 to 7 mph.

    Low: 17 °F

    Decreasing
    Clouds

  • M.L.King Day

    M.L.King Day: Mostly sunny, with a high near 34. Southwest wind 5 to 15 mph, with gusts as high as 33 mph.

    High: 34 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 11. Wind chill values as low as zero. West wind 10 to 14 mph, with gusts as high as 29 mph.

    Low: 11 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 22. Wind chill values as low as zero. West wind 9 to 14 mph, with gusts as high as 28 mph.

    High: 22 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 9. Light and variable wind.

    Low: 9 °F

    Mostly Clear

  • Wednesday

    Wednesday: Mostly sunny, with a high near 34.

    High: 34 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 27.

    Low: 27 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 39.

    High: 39 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 16.

    Low: 16 °F

    Partly Cloudy

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 17. West wind 3 to 7 mph.
M.L.King Day
Mostly sunny, with a high near 34. Southwest wind 5 to 15 mph, with gusts as high as 33 mph.
Monday Night
Mostly clear, with a low around 11. Wind chill values as low as zero. West wind 10 to 14 mph, with gusts as high as 29 mph.
Tuesday
Sunny, with a high near 22. Wind chill values as low as zero. West wind 9 to 14 mph, with gusts as high as 28 mph.
Tuesday Night
Mostly clear, with a low around 9. Light and variable wind.
Wednesday
Mostly sunny, with a high near 34.
Wednesday Night
Mostly cloudy, with a low around 27.
Thursday
Partly sunny, with a high near 39.
Thursday Night
Partly cloudy, with a low around 16.
Friday
Mostly sunny, with a high near 32.
Friday Night
Mostly cloudy, with a low around 19.
Saturday
A chance of snow showers. Partly sunny, with a high near 29. Chance of precipitation is 30%.
Saturday Night
A chance of snow showers. Mostly cloudy, with a low around 13. Chance of precipitation is 30%.
Sunday
A chance of snow showers. Partly sunny, with a high near 21. Chance of precipitation is 40%.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Hallam PA
 40°N 76.6°W (Elev. 364 ft)
Last Update:
1:39 pm EST Jan 18, 2026
Forecast Valid:
3pm EST Jan 18, 2026-6pm EST Jan 25, 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