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.

Mostly Cloudy

41°F

5°C

Humidity 73%
Wind Speed SE 7 mph
Barometer 30.15 in (1021.4 mb)
Dewpoint 33°F (1°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 19 Mar 11:56 pm EDT
Extended Forecast for

Hallam PA

  • Overnight

    Overnight: Mostly cloudy, then gradually becoming mostly clear, with a low around 36. Southwest wind 3 to 5 mph.

    Low: 36 °F

    Decreasing
    Clouds

  • Friday

    Friday: A chance of showers, mainly after 4pm. Partly sunny, with a high near 63. Light south wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Mostly Sunny
    then Chance
    Showers

  • Friday Night

    Friday Night: Showers and thunderstorms likely, mainly before 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 45. Southwest wind 7 to 13 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 45 °F

    Showers
    Likely then
    Slight Chance
    T-storms

  • Saturday

    Saturday: Mostly sunny, with a high near 55. Northwest wind 7 to 10 mph.

    High: 55 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 42. Light and variable wind becoming south around 6 mph in the evening.

    Low: 42 °F

    Mostly Cloudy

  • Sunday

    Sunday: Partly sunny, with a high near 69.

    High: 69 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: Rain likely, mainly after 2am. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.

    Low: 46 °F

    Rain Likely

  • Monday

    Monday: Rain likely, mainly before 8am. Partly sunny, with a high near 53. Chance of precipitation is 60%.

    High: 53 °F

    Rain Likely
    then Chance
    Rain

  • Monday Night

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

    Low: 29 °F

    Partly Cloudy

Detailed Forecast

Overnight
Mostly cloudy, then gradually becoming mostly clear, with a low around 36. Southwest wind 3 to 5 mph.
Friday
A chance of showers, mainly after 4pm. Partly sunny, with a high near 63. Light south wind increasing to 9 to 14 mph in the morning. Winds could gust as high as 25 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
Showers and thunderstorms likely, mainly before 11pm. Cloudy, then gradually becoming partly cloudy, with a low around 45. Southwest wind 7 to 13 mph becoming northwest after midnight. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Mostly sunny, with a high near 55. Northwest wind 7 to 10 mph.
Saturday Night
Mostly cloudy, with a low around 42. Light and variable wind becoming south around 6 mph in the evening.
Sunday
Partly sunny, with a high near 69.
Sunday Night
Rain likely, mainly after 2am. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Monday
Rain likely, mainly before 8am. Partly sunny, with a high near 53. Chance of precipitation is 60%.
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 34.
Wednesday
Mostly cloudy, with a high near 50.
Wednesday Night
Mostly cloudy, with a low around 35.
Thursday
Partly sunny, with a high near 58.
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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:
12:29 am EDT Mar 20, 2026
Forecast Valid:
12am EDT Mar 20, 2026-6pm EDT Mar 26, 2026
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation