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.

Snow

21°F

-6°C

Humidity 81%
Wind Speed W 15 G 24 mph
Barometer 29.93 in (1015.8 mb)
Dewpoint 16°F (-9°C)
Visibility 0.50 mi
Wind Chill7°F (-14°C)
Last update 30 Dec 11:53 am EST
Extended Forecast for

Castle Shannon PA

  • This Afternoon

    This Afternoon: Mostly cloudy, with a high near 27. Breezy, with a west wind 17 to 21 mph, with gusts as high as 32 mph.

    High: 27 °F

    Mostly Cloudy
    and Breezy

  • Tonight

    Tonight: Snow likely, mainly between 1am and 5am. Cloudy, with a low around 21. West wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 21 °F

    Mostly Cloudy
    then Snow
    Likely

  • Wednesday

    Wednesday: Snow, mainly after 3pm. High near 31. Southwest wind 13 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.

    High: 31 °F

    Chance Snow
    then Snow

  • Wednesday Night

    Wednesday Night: Snow. Low around 16. West wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.

    Low: 16 °F

    Snow

  • New Year's Day

    New Year's Day: Partly sunny, with a high near 23. West wind 10 to 14 mph.

    High: 23 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 15.

    Low: 15 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 33.

    High: 33 °F

    Partly Sunny

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 18.

    Low: 18 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 31.

    High: 31 °F

    Mostly Cloudy

Detailed Forecast

This Afternoon
Mostly cloudy, with a high near 27. Breezy, with a west wind 17 to 21 mph, with gusts as high as 32 mph.
Tonight
Snow likely, mainly between 1am and 5am. Cloudy, with a low around 21. West wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Wednesday
Snow, mainly after 3pm. High near 31. Southwest wind 13 to 15 mph, with gusts as high as 25 mph. Chance of precipitation is 80%. New snow accumulation of less than one inch possible.
Wednesday Night
Snow. Low around 16. West wind 14 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 100%. New snow accumulation of 1 to 3 inches possible.
New Year's Day
Partly sunny, with a high near 23. West wind 10 to 14 mph.
Thursday Night
Mostly cloudy, with a low around 15.
Friday
Partly sunny, with a high near 33.
Friday Night
Mostly cloudy, with a low around 18.
Saturday
Mostly cloudy, with a high near 31.
Saturday Night
Partly cloudy, with a low around 16.
Sunday
Partly sunny, with a high near 33.
Sunday Night
Mostly cloudy, with a low around 24.
Monday
A chance of rain. Mostly cloudy, with a high near 38. 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:
11:58 am EST Dec 30, 2025
Forecast Valid:
12pm EST Dec 30, 2025-6pm EST Jan 5, 2026
 
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Additional Resources

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Chance of Precipitation