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.

Light Rain

65°F

18°C

Humidity 70%
Wind Speed S 10 mph
Barometer 29.85 in (1010.7 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 4 Nov 9:53 pm EST
Extended Forecast for

Castle Shannon PA

  • Tonight

    Tonight: Rain. Low around 57. South wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    Low: 57 °F

    Rain

  • Thursday

    Thursday: A chance of rain before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 69. Southwest wind 10 to 15 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 69 °F

    Chance Rain
    then Mostly
    Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 49. Southwest wind around 7 mph.

    Low: 49 °F

    Mostly Cloudy

  • Friday

    Friday: A slight chance of rain. Mostly cloudy, with a high near 62. Southwest wind 6 to 11 mph becoming west in the afternoon. Chance of precipitation is 20%.

    High: 62 °F

    Slight Chance
    Rain

  • Friday Night

    Friday Night: A slight chance of rain before 1am. Mostly cloudy, with a low around 42. West wind 7 to 9 mph. Chance of precipitation is 20%.

    Low: 42 °F

    Slight Chance
    Rain

  • Saturday

    Saturday: A slight chance of rain after 1pm. Mostly cloudy, with a high near 52. Chance of precipitation is 20%.

    High: 52 °F

    Mostly Cloudy
    then Slight
    Chance Rain

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 38.

    Low: 38 °F

    Mostly Cloudy

  • Sunday

    Sunday: Mostly sunny, with a high near 55.

    High: 55 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 37.

    Low: 37 °F

    Mostly Clear

Detailed Forecast

Tonight
Rain. Low around 57. South wind 10 to 13 mph, with gusts as high as 23 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Thursday
A chance of rain before 7am. Mostly cloudy, then gradually becoming sunny, with a high near 69. Southwest wind 10 to 15 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday Night
Mostly cloudy, with a low around 49. Southwest wind around 7 mph.
Friday
A slight chance of rain. Mostly cloudy, with a high near 62. Southwest wind 6 to 11 mph becoming west in the afternoon. Chance of precipitation is 20%.
Friday Night
A slight chance of rain before 1am. Mostly cloudy, with a low around 42. West wind 7 to 9 mph. Chance of precipitation is 20%.
Saturday
A slight chance of rain after 1pm. Mostly cloudy, with a high near 52. Chance of precipitation is 20%.
Saturday Night
Mostly cloudy, with a low around 38.
Sunday
Mostly sunny, with a high near 55.
Sunday Night
Mostly clear, with a low around 37.
Monday
Mostly sunny, with a high near 57.
Monday Night
Mostly clear, with a low around 39.
Tuesday
Sunny, with a high near 61.
Tuesday Night
Partly cloudy, with a low around 38.
Veterans Day
Mostly sunny, with a high near 60.
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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:
10:26 pm EST Nov 4, 2026
Forecast Valid:
10pm EST Nov 4, 2026-6pm EST Nov 11, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation