National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Pittsburgh - Allegheny County Airport (KAGC)

Lat: 40.36°NLon: 79.92°WElev: 1237ft.

Partly Cloudy

82°F

28°C

Humidity 55%
Wind Speed NW 6 mph
Barometer 30.10 in (1018.9 mb)
Dewpoint 64°F (18°C)
Visibility 10.00 mi
Heat Index84°F (29°C)
Last update 30 Aug 4:53 pm EDT
Extended Forecast for

Castle Shannon PA

  • This Afternoon

    This Afternoon: A slight chance of showers. Partly sunny, with a high near 86. West wind around 8 mph. Chance of precipitation is 20%.

    High: 86 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: A slight chance of showers before 9pm. Mostly cloudy, with a low around 69. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.

    Low: 69 °F

    Slight Chance
    Showers then
    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 87. West wind 3 to 8 mph.

    High: 87 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 72. Southwest wind 5 to 7 mph.

    Low: 72 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny and hot, with a high near 90. West wind 7 to 11 mph.

    High: 90 °F

    Hot

  • Tuesday Night

    Tuesday Night: A slight chance of showers after 2am. Partly cloudy, with a low around 73. Chance of precipitation is 20%.

    Low: 73 °F

    Partly Cloudy
    then Slight
    Chance
    Showers

  • Wednesday

    Wednesday: Mostly sunny and hot, with a high near 92.

    High: 92 °F

    Hot

  • Wednesday Night

    Wednesday Night: A chance of showers, with thunderstorms also possible after 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 50%.

    Low: 73 °F

    Chance
    Showers then
    Chance
    T-storms

  • Thursday

    Thursday: A chance of thunderstorms before 8am, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 60%.

    High: 89 °F

    Chance
    T-storms then
    Showers
    Likely

Detailed Forecast

This Afternoon
A slight chance of showers. Partly sunny, with a high near 86. West wind around 8 mph. Chance of precipitation is 20%.
Tonight
A slight chance of showers before 9pm. Mostly cloudy, with a low around 69. Northwest wind around 5 mph becoming calm in the evening. Chance of precipitation is 20%.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 87. West wind 3 to 8 mph.
Monday Night
Mostly cloudy, with a low around 72. Southwest wind 5 to 7 mph.
Tuesday
Mostly sunny and hot, with a high near 90. West wind 7 to 11 mph.
Tuesday Night
A slight chance of showers after 2am. Partly cloudy, with a low around 73. Chance of precipitation is 20%.
Wednesday
Mostly sunny and hot, with a high near 92.
Wednesday Night
A chance of showers, with thunderstorms also possible after 2am. Mostly cloudy, with a low around 73. Chance of precipitation is 50%.
Thursday
A chance of thunderstorms before 8am, then showers likely and possibly a thunderstorm after 2pm. Partly sunny, with a high near 89. Chance of precipitation is 60%.
Thursday Night
Showers likely and possibly a thunderstorm. Mostly cloudy, with a low around 69. Chance of precipitation is 60%.
Friday
A chance of showers and thunderstorms. Partly sunny, with a high near 84. Chance of precipitation is 40%.
Friday Night
A chance of showers and thunderstorms. Mostly cloudy, with a low around 65. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 81.
Saturday Night
Mostly clear, with a low around 62.
Sunday
Mostly sunny, with a high near 80.
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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:
2:21 pm EDT Aug 30, 2026
Forecast Valid:
5pm EDT Aug 30, 2026-6pm EDT Sep 6, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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