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

53°F

12°C

Humidity 24%
Wind Speed S 12 G 18 mph
Barometer 30.41 in (1031.1 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill49°F (9°C)
Last update 8 Apr 1:53 pm EDT
Extended Forecast for

Castle Shannon PA

  • This Afternoon

    This Afternoon: Sunny, with a high near 60. Southeast wind around 9 mph.

    High: 60 °F

    Sunny

  • Tonight

    Tonight: Mostly clear, with a low around 37. South wind around 9 mph.

    Low: 37 °F

    Mostly Clear

  • 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. 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

Detailed Forecast

This Afternoon
Sunny, with a high near 60. Southeast wind around 9 mph.
Tonight
Mostly clear, 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. 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. 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%.
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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:
11:47 am EDT Apr 8, 2026
Forecast Valid:
2pm EDT Apr 8, 2026-6pm EDT Apr 14, 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