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

76°F

24°C

Humidity 29%
Wind Speed Calm
Barometer 30.18 in (1021.9 mb)
Dewpoint 41°F (5°C)
Visibility 10.00 mi
Heat Index77°F (25°C)
Last update 23 Apr 4:53 pm EDT
Extended Forecast for

Castle Shannon PA

  • Tonight

    Tonight: Partly cloudy, with a low around 53. Light southeast wind.

    Low: 53 °F

    Partly Cloudy

  • Thursday

    Thursday: Sunny, with a high near 86. South wind around 6 mph.

    High: 86 °F

    Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 59. Southeast wind 3 to 7 mph.

    Low: 59 °F

    Partly Cloudy

  • Friday

    Friday: A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 74. South wind 7 to 11 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 74 °F

    Chance
    Showers then
    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm. Low around 53. South wind 9 to 11 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.

    Low: 53 °F

    Showers

  • Saturday

    Saturday: A chance of showers and thunderstorms before 2pm. Mostly cloudy, with a high near 61. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 61 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Mostly clear, with a low around 40.

    Low: 40 °F

    Mostly Clear

  • Sunday

    Sunday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 43.

    Low: 43 °F

    Mostly Clear

Detailed Forecast

Tonight
Partly cloudy, with a low around 53. Light southeast wind.
Thursday
Sunny, with a high near 86. South wind around 6 mph.
Thursday Night
Partly cloudy, with a low around 59. Southeast wind 3 to 7 mph.
Friday
A chance of showers, then showers and possibly a thunderstorm after 2pm. High near 74. South wind 7 to 11 mph. Chance of precipitation is 80%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday Night
Showers and possibly a thunderstorm. Low around 53. South wind 9 to 11 mph. Chance of precipitation is 90%. New rainfall amounts between a half and three quarters of an inch possible.
Saturday
A chance of showers and thunderstorms before 2pm. Mostly cloudy, with a high near 61. Chance of precipitation is 30%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Mostly clear, with a low around 40.
Sunday
Sunny, with a high near 66.
Sunday Night
Mostly clear, with a low around 43.
Monday
Sunny, with a high near 76.
Monday Night
Partly cloudy, with a low around 59.
Tuesday
A chance of showers. Partly sunny, with a high near 83. Chance of precipitation is 30%.
Tuesday Night
A chance of showers. Mostly cloudy, with a low around 62. Chance of precipitation is 40%.
Wednesday
A chance of showers. Mostly cloudy, with a high near 74. Chance of precipitation is 50%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Castle Shannon PA
 40.37°N 80.02°W (Elev. 1109 ft)
Last Update:
4:02 pm EDT Apr 23, 2025
Forecast Valid:
5pm EDT Apr 23, 2025-6pm EDT Apr 30, 2025
 
Forecast Discussion
 
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Additional Resources

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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