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.

Fog/Mist

31°F

-1°C

Humidity 92%
Wind Speed NW 6 mph
Barometer 29.82 in (1011.5 mb)
Dewpoint 29°F (-2°C)
Visibility 5.00 mi
Wind Chill25°F (-4°C)
Last update 2 Dec 11:53 am EST
Extended Forecast for

Castle Shannon PA

  • This Afternoon

    This Afternoon: Cloudy, with a high near 35. Northwest wind 7 to 9 mph.

    High: 35 °F

    Cloudy

  • Tonight

    Tonight: Mostly cloudy, with a low around 23. Northwest wind around 7 mph.

    Low: 23 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 33. Southwest wind 6 to 10 mph.

    High: 33 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A chance of snow after 1am. Increasing clouds, with a low around 25. Southwest wind 7 to 9 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 25 °F

    Mostly Cloudy
    then Chance
    Snow

  • Thursday

    Thursday: A chance of snow before 1pm. Mostly cloudy, with a high near 30. Northwest wind 10 to 15 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    High: 30 °F

    Chance Snow

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 10.

    Low: 10 °F

    Partly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 32.

    High: 32 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 23.

    Low: 23 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 35.

    High: 35 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Cloudy, with a high near 35. Northwest wind 7 to 9 mph.
Tonight
Mostly cloudy, with a low around 23. Northwest wind around 7 mph.
Wednesday
Partly sunny, with a high near 33. Southwest wind 6 to 10 mph.
Wednesday Night
A chance of snow after 1am. Increasing clouds, with a low around 25. Southwest wind 7 to 9 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Thursday
A chance of snow before 1pm. Mostly cloudy, with a high near 30. Northwest wind 10 to 15 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Thursday Night
Partly cloudy, with a low around 10.
Friday
Partly sunny, with a high near 32.
Friday Night
Mostly cloudy, with a low around 23.
Saturday
Mostly cloudy, with a high near 35.
Saturday Night
Mostly cloudy, with a low around 25.
Sunday
A chance of snow. Mostly cloudy, with a high near 32. Chance of precipitation is 30%.
Sunday Night
A chance of snow. Mostly cloudy, with a low around 18. Chance of precipitation is 30%.
Monday
Partly sunny, with a high near 29.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castle Shannon PA
 40.35°N 80.03°W (Elev. 1198 ft)
Last Update:
12:14 pm EST Dec 2, 2025
Forecast Valid:
12pm EST Dec 2, 2025-6pm EST Dec 8, 2025
 
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