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Hazardous Weather Conditions

Current conditions at

Pittsburgh - Allegheny County Airport (KAGC)

Lat: 40.36°NLon: 79.92°WElev: 1237ft.

Overcast

73°F

23°C

Humidity 59%
Wind Speed NW 5 mph
Barometer 30.09 in (1018.8 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 25 Aug 2:53 pm EDT
Extended Forecast for

Castle Shannon PA

  • This Afternoon

    This Afternoon: Mostly sunny, with a high near 77. West wind around 8 mph.

    High: 77 °F

    Mostly Sunny

  • Tonight

    Tonight: Patchy fog between 2am and 5am. Otherwise, partly cloudy, with a low around 60. Calm wind.

    Low: 60 °F

    Partly Cloudy
    then Patchy
    Fog

  • Wednesday

    Wednesday: Patchy fog before 10am. Otherwise, mostly sunny, with a high near 81. Calm wind becoming south around 6 mph in the afternoon.

    High: 81 °F

    Patchy Fog
    then Mostly
    Sunny

  • Wednesday Night

    Wednesday Night: Increasing clouds, with a low around 64. South wind 3 to 5 mph.

    Low: 64 °F

    Increasing
    Clouds

  • Thursday

    Thursday: A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 82. Southwest wind 5 to 9 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 82 °F

    Slight Chance
    Showers then
    Chance
    T-storms

  • Thursday Night

    Thursday Night: A chance of showers and thunderstorms before 2am. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 64. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 64 °F

    Chance
    T-storms then
    Chance
    Showers and
    Patchy Fog

  • Friday

    Friday: Mostly sunny, with a high near 81.

    High: 81 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 59.

    Low: 59 °F

    Mostly Clear

  • Saturday

    Saturday: Sunny, with a high near 80.

    High: 80 °F

    Sunny

Detailed Forecast

This Afternoon
Mostly sunny, with a high near 77. West wind around 8 mph.
Tonight
Patchy fog between 2am and 5am. Otherwise, partly cloudy, with a low around 60. Calm wind.
Wednesday
Patchy fog before 10am. Otherwise, mostly sunny, with a high near 81. Calm wind becoming south around 6 mph in the afternoon.
Wednesday Night
Increasing clouds, with a low around 64. South wind 3 to 5 mph.
Thursday
A slight chance of showers, then a chance of showers and thunderstorms after 2pm. Partly sunny, with a high near 82. Southwest wind 5 to 9 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
A chance of showers and thunderstorms before 2am. Patchy fog after 1am. Otherwise, mostly cloudy, with a low around 64. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Friday
Mostly sunny, with a high near 81.
Friday Night
Mostly clear, with a low around 59.
Saturday
Sunny, with a high near 80.
Saturday Night
Mostly clear, with a low around 62.
Sunday
Mostly sunny, with a high near 84.
Sunday Night
Partly cloudy, with a low around 67.
Monday
Mostly sunny, with a high near 86.
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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:
2:21 pm EDT Aug 25, 2026
Forecast Valid:
3pm EDT Aug 25, 2026-6pm EDT Aug 31, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation