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

65°F

18°C

Humidity 78%
Wind Speed NA
Barometer 30.05 in (1017.3 mb)
Dewpoint 58°F (14°C)
Visibility 10.00 mi
Last update 4 Aug 12:53 am EDT
Extended Forecast for

Castle Shannon PA

  • Overnight

    Overnight: Clear, with a low around 58. Northeast wind 3 to 5 mph.

    Low: 58 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 85. Calm wind becoming southeast around 5 mph in the afternoon.

    High: 85 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Increasing clouds, with a low around 68. East wind 5 to 7 mph.

    Low: 68 °F

    Increasing
    Clouds

  • Wednesday

    Wednesday: Isolated showers, then scattered showers and thunderstorms after 2pm. Partly sunny, with a high near 86. Southeast wind 3 to 7 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 86 °F

    Partly Sunny
    then
    Scattered
    T-storms

  • Wednesday Night

    Wednesday Night: Scattered showers and thunderstorms before 2am, then isolated showers. Mostly cloudy, with a low around 69. South wind 3 to 5 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 69 °F

    Scattered
    T-storms then
    Scattered
    Showers

  • Thursday

    Thursday: A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    High: 85 °F

    Chance
    Showers then
    Showers
    Likely

  • Thursday Night

    Thursday Night: Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm, then a chance of showers after 11pm. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.

    Low: 68 °F

    Showers
    Likely

  • Friday

    Friday: Showers likely, then showers and possibly a thunderstorm after 2pm. High near 82. Chance of precipitation is 80%.

    High: 82 °F

    Showers

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 68. Chance of precipitation is 80%.

    Low: 68 °F

    Showers

Detailed Forecast

Overnight
Clear, with a low around 58. Northeast wind 3 to 5 mph.
Tuesday
Sunny, with a high near 85. Calm wind becoming southeast around 5 mph in the afternoon.
Tuesday Night
Increasing clouds, with a low around 68. East wind 5 to 7 mph.
Wednesday
Isolated showers, then scattered showers and thunderstorms after 2pm. Partly sunny, with a high near 86. Southeast wind 3 to 7 mph. Chance of precipitation is 30%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday Night
Scattered showers and thunderstorms before 2am, then isolated showers. Mostly cloudy, with a low around 69. South wind 3 to 5 mph. Chance of precipitation is 50%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday
A chance of showers before 11am, then a chance of showers and thunderstorms between 11am and 2pm, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 85. Chance of precipitation is 70%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Thursday Night
Showers likely and possibly a thunderstorm before 8pm, then a chance of showers and thunderstorms between 8pm and 11pm, then a chance of showers after 11pm. Mostly cloudy, with a low around 68. Chance of precipitation is 60%.
Friday
Showers likely, then showers and possibly a thunderstorm after 2pm. High near 82. Chance of precipitation is 80%.
Friday Night
Showers and possibly a thunderstorm before 2am, then a chance of showers. Low around 68. Chance of precipitation is 80%.
Saturday
A chance of showers, with thunderstorms also possible after 2pm. Mostly cloudy, with a high near 82. Chance of precipitation is 50%.
Saturday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 68. Chance of precipitation is 40%.
Sunday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 30%.
Sunday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 69. Chance of precipitation is 30%.
Monday
A chance of showers and thunderstorms. Partly sunny, with a high near 85. Chance of precipitation is 40%.
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ABOUT THIS FORECAST

 
Point Forecast:
Castle Shannon PA
 40.35°N 80.03°W (Elev. 1198 ft)
Last Update:
12:26 am EDT Aug 4, 2026
Forecast Valid:
1am EDT Aug 4, 2026-6pm EDT Aug 10, 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