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

Pittsburgh - Allegheny County Airport (KAGC)

Lat: 40.36°NLon: 79.92°WElev: 1237ft.

Fair

48°F

9°C

Humidity 30%
Wind Speed SE 8 mph
Barometer 30.34 in (1028.7 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 8 Apr 10:53 pm EDT
Extended Forecast for

Castle Shannon PA

  • Tonight

    Tonight: Partly cloudy, with a low around 37. South wind around 9 mph.

    Low: 37 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 72. Southwest wind 8 to 11 mph.

    High: 72 °F

    Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 51. South wind around 7 mph.

    Low: 51 °F

    Mostly Clear

  • Friday

    Friday: A slight chance of showers after 2pm. Mostly sunny, with a high near 74. Southwest wind 8 to 15 mph. Chance of precipitation is 20%.

    High: 74 °F

    Mostly Sunny
    then Slight
    Chance
    Showers

  • Friday Night

    Friday Night: A chance of showers, mainly between 8pm and 2am. Mostly cloudy, with a low around 44. West wind 8 to 10 mph becoming northwest after midnight. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 44 °F

    Chance
    Showers

  • Saturday

    Saturday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 44.

    Low: 44 °F

    Partly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 78.

    High: 78 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 63.

    Low: 63 °F

    Mostly Cloudy

Detailed Forecast

Tonight
Partly cloudy, with a low around 37. South wind around 9 mph.
Thursday
Sunny, with a high near 72. Southwest wind 8 to 11 mph.
Thursday Night
Mostly clear, with a low around 51. South wind around 7 mph.
Friday
A slight chance of showers after 2pm. Mostly sunny, with a high near 74. Southwest wind 8 to 15 mph. Chance of precipitation is 20%.
Friday Night
A chance of showers, mainly between 8pm and 2am. Mostly cloudy, with a low around 44. West wind 8 to 10 mph becoming northwest after midnight. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Sunny, with a high near 63.
Saturday Night
Partly cloudy, with a low around 44.
Sunday
Mostly sunny, with a high near 78.
Sunday Night
Mostly cloudy, with a low around 63.
Monday
A chance of showers after 2pm. Mostly cloudy, with a high near 77. Chance of precipitation is 30%.
Monday Night
A chance of showers. Mostly cloudy, with a low around 64. Chance of precipitation is 30%.
Tuesday
A chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 40%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 64. Chance of precipitation is 40%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 78. Chance of precipitation is 50%.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castle Shannon PA
 40.37°N 80.02°W (Elev. 1109 ft)
Last Update:
8:56 pm EDT Apr 8, 2026
Forecast Valid:
11pm EDT Apr 8, 2026-6pm EDT Apr 15, 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