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.

A Few Clouds

36°F

2°C

Humidity 48%
Wind Speed E 5 mph
Barometer 30.32 in (1027.1 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill32°F (0°C)
Last update 15 Mar 2:56 am EDT
Extended Forecast for

Hallam PA

  • Overnight

    Overnight: Mostly cloudy, with a low around 35. East wind around 6 mph.

    Low: 35 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly cloudy, with a high near 53. Breezy, with a southeast wind 10 to 20 mph, with gusts as high as 33 mph.

    High: 53 °F

    Mostly Cloudy
    then Mostly
    Cloudy and
    Breezy

  • Sunday Night

    Sunday Night: Showers, mainly before 4am. Low around 47. Breezy, with a southeast wind 18 to 20 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 47 °F

    Breezy.
    Showers
    Likely then
    Showers

  • Monday

    Monday: Showers and possibly a thunderstorm, mainly after 11am. Some of the storms could be severe. High near 66. Breezy, with a south wind 18 to 23 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 66 °F

    Severe
    Thunderstorms
    and Breezy

  • Monday Night

    Monday Night: Rain showers before 11pm, then rain and snow showers. Some thunder is also possible. Low around 27. Breezy, with a west wind 20 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.

    Low: 27 °F

    Rain/Snow and
    Breezy

  • Tuesday

    Tuesday: Partly sunny, with a high near 35. Breezy.

    High: 35 °F

    Partly Sunny
    and Breezy

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 22.

    Low: 22 °F

    Mostly Clear

  • Wednesday

    Wednesday: Partly sunny, with a high near 37.

    High: 37 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, with a low around 35. East wind around 6 mph.
Sunday
Mostly cloudy, with a high near 53. Breezy, with a southeast wind 10 to 20 mph, with gusts as high as 33 mph.
Sunday Night
Showers, mainly before 4am. Low around 47. Breezy, with a southeast wind 18 to 20 mph, with gusts as high as 36 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Monday
Showers and possibly a thunderstorm, mainly after 11am. Some of the storms could be severe. High near 66. Breezy, with a south wind 18 to 23 mph, with gusts as high as 41 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Monday Night
Rain showers before 11pm, then rain and snow showers. Some thunder is also possible. Low around 27. Breezy, with a west wind 20 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 90%. New snow accumulation of less than a half inch possible.
Tuesday
Partly sunny, with a high near 35. Breezy.
Tuesday Night
Mostly clear, with a low around 22.
Wednesday
Partly sunny, with a high near 37.
Wednesday Night
Mostly cloudy, with a low around 29.
Thursday
Mostly cloudy, with a high near 48.
Thursday Night
Mostly cloudy, with a low around 34.
Friday
Mostly sunny, with a high near 53.
Friday Night
A chance of showers. Mostly cloudy, with a low around 39. Chance of precipitation is 40%.
Saturday
A chance of showers. Partly sunny, with a high near 51. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Hallam PA
 40.02°N 76.6°W (Elev. 522 ft)
Last Update:
2:35 am EDT Mar 15, 2026
Forecast Valid:
3am EDT Mar 15, 2026-6pm EDT Mar 21, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation