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.

Overcast

26°F

-3°C

Humidity 69%
Wind Speed NW 7 mph
Barometer 29.74 in (1008.8 mb)
Dewpoint 17°F (-8°C)
Visibility 10.00 mi
Wind Chill18°F (-8°C)
Last update 11 Dec 3:53 am EST
Extended Forecast for

Castle Shannon PA

  • Overnight

    Overnight: A slight chance of snow showers. Mostly cloudy, with a low around 22. West wind around 16 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.

    Low: 22 °F

    Slight Chance
    Snow Showers

  • Thursday

    Thursday: A slight chance of snow showers before 10am, then a chance of flurries between 10am and 1pm. Increasing clouds, with a high near 29. West wind 14 to 17 mph. Chance of precipitation is 20%.

    High: 29 °F

    Slight Chance
    Snow Showers
    then Mostly
    Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 21. West wind 6 to 10 mph.

    Low: 21 °F

    Mostly Cloudy

  • Friday

    Friday: A chance of snow, mainly after 1pm. Partly sunny, with a high near 32. Light and variable wind becoming east around 5 mph in the afternoon. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 32 °F

    Chance Snow

  • Friday Night

    Friday Night: A chance of snow. Mostly cloudy, with a low around 23. Light and variable wind becoming southwest 5 to 7 mph after midnight. Chance of precipitation is 40%. Little or no snow accumulation expected.

    Low: 23 °F

    Chance Snow

  • Saturday

    Saturday: Snow likely, mainly after 1pm. Cloudy, with a high near 32. Chance of precipitation is 60%.

    High: 32 °F

    Slight Chance
    Snow then
    Snow Likely

  • Saturday Night

    Saturday Night: Snow. Low around 13. Chance of precipitation is 80%.

    Low: 13 °F

    Snow

  • Sunday

    Sunday: A chance of snow. Mostly cloudy, with a high near 20. Chance of precipitation is 40%.

    High: 20 °F

    Chance Snow

  • Sunday Night

    Sunday Night: A chance of snow before 1am. Mostly cloudy, with a low around 13. Chance of precipitation is 30%.

    Low: 13 °F

    Chance Snow

Detailed Forecast

Overnight
A slight chance of snow showers. Mostly cloudy, with a low around 22. West wind around 16 mph, with gusts as high as 26 mph. Chance of precipitation is 20%.
Thursday
A slight chance of snow showers before 10am, then a chance of flurries between 10am and 1pm. Increasing clouds, with a high near 29. West wind 14 to 17 mph. Chance of precipitation is 20%.
Thursday Night
Mostly cloudy, with a low around 21. West wind 6 to 10 mph.
Friday
A chance of snow, mainly after 1pm. Partly sunny, with a high near 32. Light and variable wind becoming east around 5 mph in the afternoon. Chance of precipitation is 30%. Little or no snow accumulation expected.
Friday Night
A chance of snow. Mostly cloudy, with a low around 23. Light and variable wind becoming southwest 5 to 7 mph after midnight. Chance of precipitation is 40%. Little or no snow accumulation expected.
Saturday
Snow likely, mainly after 1pm. Cloudy, with a high near 32. Chance of precipitation is 60%.
Saturday Night
Snow. Low around 13. Chance of precipitation is 80%.
Sunday
A chance of snow. Mostly cloudy, with a high near 20. Chance of precipitation is 40%.
Sunday Night
A chance of snow before 1am. Mostly cloudy, with a low around 13. Chance of precipitation is 30%.
Monday
Mostly cloudy, with a high near 22.
Monday Night
Mostly cloudy, with a low around 15.
Tuesday
Partly sunny, with a high near 31.
Tuesday Night
Mostly cloudy, with a low around 23.
Wednesday
A chance of rain. Mostly cloudy, with a high near 40. Chance of precipitation is 30%.
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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:
12:21 am EST Dec 11, 2025
Forecast Valid:
4am EST Dec 11, 2025-6pm EST Dec 17, 2025
 
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