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.

Fair

33°F

1°C

Humidity 38%
Wind Speed W 14 G 26 mph
Barometer 30.10 in (1020.8 mb)
Dewpoint 10°F (-12°C)
Visibility 10.00 mi
Wind Chill23°F (-5°C)
Last update 22 Jan 12:53 pm EST
Extended Forecast for

Castle Shannon PA

Winter Storm Watch January 24, 07:00pm until January 26, 01:00pm
Click here for hazard details and duration
Winter Storm Watch

  • This Afternoon

    This Afternoon: Partly sunny, with a high near 34. West wind 14 to 17 mph, with gusts as high as 31 mph.

    High: 34 °F

    Partly Sunny

  • Tonight

    Tonight: Cloudy, then gradually becoming partly cloudy, with a low around 17. West wind 8 to 10 mph, with gusts as high as 20 mph.

    Low: 17 °F

    Decreasing
    Clouds

  • Friday

    Friday: Mostly sunny, with a temperature falling to around 12 by 5pm. Wind chill values as low as -3. West wind 11 to 17 mph.

    High: 23 °F⇓

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 0. Wind chill values as low as -10. Northwest wind 6 to 13 mph.

    Low: 0 °F

    Partly Cloudy

  • Saturday

    Saturday: A slight chance of snow after 1pm. Mostly cloudy and cold, with a high near 14. Northeast wind 5 to 8 mph. Chance of precipitation is 20%.

    High: 14 °F

    Partly Sunny
    then Slight
    Chance Snow

  • Saturday Night

    Saturday Night: Snow. Low around 11. Chance of precipitation is 90%.

    Low: 11 °F

    Snow

  • Sunday

    Sunday: Snow. The snow could be heavy at times. High near 25. Chance of precipitation is 100%.

    High: 25 °F

    Heavy Snow

  • Sunday Night

    Sunday Night: Snow. Low around 13. Chance of precipitation is 90%.

    Low: 13 °F

    Snow

  • Monday

    Monday: A chance of snow. Mostly cloudy, with a high near 18. Chance of precipitation is 50%.

    High: 18 °F

    Chance Snow

Detailed Forecast

This Afternoon
Partly sunny, with a high near 34. West wind 14 to 17 mph, with gusts as high as 31 mph.
Tonight
Cloudy, then gradually becoming partly cloudy, with a low around 17. West wind 8 to 10 mph, with gusts as high as 20 mph.
Friday
Mostly sunny, with a temperature falling to around 12 by 5pm. Wind chill values as low as -3. West wind 11 to 17 mph.
Friday Night
Partly cloudy, with a low around 0. Wind chill values as low as -10. Northwest wind 6 to 13 mph.
Saturday
A slight chance of snow after 1pm. Mostly cloudy and cold, with a high near 14. Northeast wind 5 to 8 mph. Chance of precipitation is 20%.
Saturday Night
Snow. Low around 11. Chance of precipitation is 90%.
Sunday
Snow. The snow could be heavy at times. High near 25. Chance of precipitation is 100%.
Sunday Night
Snow. Low around 13. Chance of precipitation is 90%.
Monday
A chance of snow. Mostly cloudy, with a high near 18. Chance of precipitation is 50%.
Monday Night
Mostly cloudy, with a low around -1.
Tuesday
Partly sunny, with a high near 17.
Tuesday Night
Mostly cloudy, with a low around 9.
Wednesday
A chance of snow. Mostly cloudy, with a high near 22. Chance of precipitation is 40%.
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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:
1:21 pm EST Jan 22, 2026
Forecast Valid:
1pm EST Jan 22, 2026-6pm EST Jan 28, 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