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

31°F

-1°C

Humidity 76%
Wind Speed SW 9 mph
Barometer 29.92 in (1014.3 mb)
Dewpoint 24°F (-4°C)
Visibility 10.00 mi
Wind Chill23°F (-5°C)
Last update 11 Jan 5:53 am EST
Extended Forecast for

Castle Shannon PA

  • Today

    Today: Snow showers. High near 35. Breezy, with a west wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 80%. Total daytime snow accumulation of 1 to 2 inches possible.

    High: 35 °F

    Snow Showers
    and Breezy

  • Tonight

    Tonight: Scattered snow showers, mainly before 9pm. Mostly cloudy, with a low around 27. West wind 10 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

    Low: 27 °F

    Scattered
    Snow Showers
    then Mostly
    Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 38. Southwest wind 11 to 16 mph, with gusts as high as 26 mph.

    High: 38 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 29. Southwest wind around 10 mph, with gusts as high as 20 mph.

    Low: 29 °F

    Mostly Clear

  • Tuesday

    Tuesday: Partly sunny, with a high near 46. South wind 10 to 15 mph, with gusts as high as 25 mph.

    High: 46 °F

    Partly Sunny

  • Tuesday Night

    Tuesday Night: A chance of rain, mainly after 1am. Mostly cloudy, with a low around 39. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 39 °F

    Slight Chance
    Rain then
    Chance Rain

  • Wednesday

    Wednesday: Rain. High near 43. Chance of precipitation is 80%.

    High: 43 °F

    Rain

  • Wednesday Night

    Wednesday Night: Rain and snow likely, becoming all snow after 1am. Mostly cloudy, with a low around 22. Chance of precipitation is 70%.

    Low: 22 °F

    Rain/Snow
    Likely

  • Thursday

    Thursday: A chance of snow. Mostly cloudy, with a high near 28. Chance of precipitation is 40%.

    High: 28 °F

    Chance Snow

Detailed Forecast

Today
Snow showers. High near 35. Breezy, with a west wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 34 mph. Chance of precipitation is 80%. Total daytime snow accumulation of 1 to 2 inches possible.
Tonight
Scattered snow showers, mainly before 9pm. Mostly cloudy, with a low around 27. West wind 10 to 16 mph, with gusts as high as 26 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Monday
Mostly sunny, with a high near 38. Southwest wind 11 to 16 mph, with gusts as high as 26 mph.
Monday Night
Mostly clear, with a low around 29. Southwest wind around 10 mph, with gusts as high as 20 mph.
Tuesday
Partly sunny, with a high near 46. South wind 10 to 15 mph, with gusts as high as 25 mph.
Tuesday Night
A chance of rain, mainly after 1am. Mostly cloudy, with a low around 39. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
Rain. High near 43. Chance of precipitation is 80%.
Wednesday Night
Rain and snow likely, becoming all snow after 1am. Mostly cloudy, with a low around 22. Chance of precipitation is 70%.
Thursday
A chance of snow. Mostly cloudy, with a high near 28. Chance of precipitation is 40%.
Thursday Night
Mostly cloudy, with a low around 18.
Friday
A chance of snow. Mostly cloudy, with a high near 31. Chance of precipitation is 30%.
Friday Night
A chance of snow. Mostly cloudy, with a low around 21. Chance of precipitation is 40%.
Saturday
A chance of snow. Mostly cloudy, with a high near 34. Chance of precipitation is 50%.
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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:
5:47 am EST Jan 11, 2026
Forecast Valid:
6am EST Jan 11, 2026-6pm EST Jan 17, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation