National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hawaii and Guam Concerns; Record Warmth Spreads Eastward; Heavy Snow for Sierra-Nevada; Severe Weather for the Plains

A very active spring pattern with tropical concerns across the Pacific. Heavy rainfall will continue to impact Hawaii this weekend. Meanwhile we continue to monitor a developing typhoon that may affect Guam into early next week. For the Lower 48, heavy snow for mountains of California this weekend, increase threat for severe thunderstorms next week for the Plains and record warmth spreads east. Read More >

Current conditions at

Harrisburg, Harrisburg International Airport (KMDT)

Lat: 40.19°NLon: 76.76°WElev: 312ft.

Fair

52°F

11°C

Humidity 45%
Wind Speed NE 5 mph
Barometer 30.39 in (1029.1 mb)
Dewpoint 31°F (-1°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 12 Apr 12:56 am EDT
Extended Forecast for

Hallam PA

  • Overnight

    Overnight: Mostly clear, with a low around 37. East wind 3 to 5 mph.

    Low: 37 °F

    Mostly Clear

  • Sunday

    Sunday: Mostly sunny, with a high near 62. Light east wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 22 mph.

    High: 62 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 52. South wind 10 to 14 mph, with gusts as high as 21 mph.

    Low: 52 °F

    Mostly Cloudy

  • Monday

    Monday: A slight chance of showers after 2pm. Mostly cloudy, with a high near 79. Southwest wind 11 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.

    High: 79 °F

    Mostly Cloudy
    then Slight
    Chance
    Showers

  • Monday Night

    Monday Night: A slight chance of showers before 2am. Partly cloudy, with a low around 59. West wind 6 to 10 mph. Chance of precipitation is 20%.

    Low: 59 °F

    Slight Chance
    Showers

  • Tuesday

    Tuesday: A slight chance of showers after 2pm. Mostly sunny, with a high near 82. Chance of precipitation is 20%.

    High: 82 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 62.

    Low: 62 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Mostly sunny, with a high near 87.

    High: 87 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 65.

    Low: 65 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Mostly clear, with a low around 37. East wind 3 to 5 mph.
Sunday
Mostly sunny, with a high near 62. Light east wind becoming south 6 to 11 mph in the morning. Winds could gust as high as 22 mph.
Sunday Night
Mostly cloudy, with a low around 52. South wind 10 to 14 mph, with gusts as high as 21 mph.
Monday
A slight chance of showers after 2pm. Mostly cloudy, with a high near 79. Southwest wind 11 to 14 mph, with gusts as high as 29 mph. Chance of precipitation is 20%.
Monday Night
A slight chance of showers before 2am. Partly cloudy, with a low around 59. West wind 6 to 10 mph. Chance of precipitation is 20%.
Tuesday
A slight chance of showers after 2pm. Mostly sunny, with a high near 82. Chance of precipitation is 20%.
Tuesday Night
Partly cloudy, with a low around 62.
Wednesday
Mostly sunny, with a high near 87.
Wednesday Night
Mostly cloudy, with a low around 65.
Thursday
Partly sunny, with a high near 86.
Thursday Night
A chance of showers. Mostly cloudy, with a low around 62. Chance of precipitation is 40%.
Friday
A chance of showers. Partly sunny, with a high near 78. Chance of precipitation is 30%.
Friday Night
Partly cloudy, with a low around 57.
Saturday
A chance of showers. Partly sunny, with a high near 79. 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:
8:05 pm EDT Apr 11, 2026
Forecast Valid:
1am EDT Apr 12, 2026-6pm EDT Apr 18, 2026
 
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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