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 Freezing Fog

13°F

-11°C

Humidity 92%
Wind Speed SE 16 G 24 mph
Barometer 29.95 in (1017.2 mb)
Dewpoint 11°F (-12°C)
Visibility 0.25 mi
Wind Chill-3°F (-19°C)
Last update 25 Jan 9:53 am EST
Extended Forecast for

Castle Shannon PA

Winter Storm Warning January 25, 10:55am until January 26, 12:00pm
Click here for hazard details and duration
Winter Storm Warning
  •  
    Winter Storm Warning January 25, 10:55am until January 26, 12:00pm

    NOW until 12:00pm Mon

    Winter Storm Warning

  • Today

    High: 27 °F

    Heavy Snow

  • Tonight

    Tonight: Snow, mainly before 1am. The snow could be heavy at times. Low around 12. North wind 6 to 11 mph becoming southwest in the evening. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.

    Low: 12 °F

    Heavy Snow
    then Chance
    Snow

  • Monday

    Monday: A chance of snow before 9am, then a chance of snow after 1pm. Mostly cloudy, with a high near 19. Wind chill values as low as -1. West wind 13 to 16 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    High: 19 °F

    Chance Snow

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 1. Wind chill values as low as -16. West wind 11 to 13 mph.

    Low: 1 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: A chance of snow after 1pm. Partly sunny, with a high near 18. Southwest wind 13 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    High: 18 °F

    Partly Sunny
    then Chance
    Snow

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around -1.

    Low: -1 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny and cold, with a high near 14.

    High: 14 °F

    Cold

  • Wednesday Night

    Wednesday Night: A chance of snow before 1am. Mostly cloudy, with a low around 1. Chance of precipitation is 40%.

    Low: 1 °F

    Chance Snow

Detailed Forecast

Today
Snow. The snow could be heavy at times. High near 27. Southeast wind 10 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 100%. Total daytime snow accumulation of 7 to 11 inches possible.
Tonight
Snow, mainly before 1am. The snow could be heavy at times. Low around 12. North wind 6 to 11 mph becoming southwest in the evening. Winds could gust as high as 21 mph. Chance of precipitation is 90%. New snow accumulation of 1 to 3 inches possible.
Monday
A chance of snow before 9am, then a chance of snow after 1pm. Mostly cloudy, with a high near 19. Wind chill values as low as -1. West wind 13 to 16 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Monday Night
Mostly cloudy, with a low around 1. Wind chill values as low as -16. West wind 11 to 13 mph.
Tuesday
A chance of snow after 1pm. Partly sunny, with a high near 18. Southwest wind 13 to 18 mph, with gusts as high as 29 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Tuesday Night
Mostly cloudy, with a low around -1.
Wednesday
Partly sunny and cold, with a high near 14.
Wednesday Night
A chance of snow before 1am. Mostly cloudy, with a low around 1. Chance of precipitation is 40%.
Thursday
Mostly cloudy and cold, with a high near 14.
Thursday Night
Mostly cloudy, with a low around -3.
Friday
Partly sunny and cold, with a high near 13.
Friday Night
Mostly cloudy, with a low around -1.
Saturday
Mostly cloudy, with a high near 18.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castle Shannon PA
 40.37°N 80.02°W (Elev. 1109 ft)
Last Update:
10:33 am EST Jan 25, 2026
Forecast Valid:
10am EST Jan 25, 2026-6pm EST Jan 31, 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