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

35°F

2°C

Humidity 78%
Wind Speed SW 18 G 26 mph
Barometer 29.94 in (1015.4 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 17 Jan 1:53 pm EST
Extended Forecast for

Castle Shannon PA

  • This Afternoon

    This Afternoon: A chance of snow showers before 4pm, then a chance of rain and snow showers. Mostly cloudy, with a high near 38. Southwest wind around 14 mph. Chance of precipitation is 30%. Total daytime snow accumulation of less than a half inch possible.

    High: 38 °F

    Chance
    Rain/Snow

  • Tonight

    Tonight: A chance of snow, mainly between midnight and 4am. Mostly cloudy, with a low around 18. West wind around 8 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.

    Low: 18 °F

    Chance Snow

  • Sunday

    Sunday: Partly sunny, with a high near 24. West wind 7 to 10 mph.

    High: 24 °F

    Partly Sunny

  • Sunday Night

    Sunday Night: A slight chance of snow showers after 1am. Mostly cloudy, with a low around 17. Southwest wind 6 to 13 mph. Chance of precipitation is 20%.

    Low: 17 °F

    Mostly Cloudy
    then Slight
    Chance Snow
    Showers

  • M.L.King Day

    M.L.King Day: A chance of snow showers before 1pm. Mostly cloudy, with a high near 26. Breezy, with a west wind 14 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.

    High: 26 °F

    Chance Snow
    Showers and
    Breezy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 6.

    Low: 6 °F

    Mostly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 17.

    High: 17 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 10.

    Low: 10 °F

    Partly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 37.

    High: 37 °F

    Partly Sunny

Detailed Forecast

This Afternoon
A chance of snow showers before 4pm, then a chance of rain and snow showers. Mostly cloudy, with a high near 38. Southwest wind around 14 mph. Chance of precipitation is 30%. Total daytime snow accumulation of less than a half inch possible.
Tonight
A chance of snow, mainly between midnight and 4am. Mostly cloudy, with a low around 18. West wind around 8 mph. Chance of precipitation is 30%. Little or no snow accumulation expected.
Sunday
Partly sunny, with a high near 24. West wind 7 to 10 mph.
Sunday Night
A slight chance of snow showers after 1am. Mostly cloudy, with a low around 17. Southwest wind 6 to 13 mph. Chance of precipitation is 20%.
M.L.King Day
A chance of snow showers before 1pm. Mostly cloudy, with a high near 26. Breezy, with a west wind 14 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 40%. New snow accumulation of less than a half inch possible.
Monday Night
Mostly cloudy, with a low around 6.
Tuesday
Mostly sunny, with a high near 17.
Tuesday Night
Partly cloudy, with a low around 10.
Wednesday
Partly sunny, with a high near 37.
Wednesday Night
A chance of snow showers. Mostly cloudy, with a low around 22. Chance of precipitation is 40%.
Thursday
A chance of snow showers. Partly sunny, with a high near 29. Chance of precipitation is 30%.
Thursday Night
Partly cloudy, with a low around 13.
Friday
Partly sunny, with a high near 31.
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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:
12:21 pm EST Jan 17, 2026
Forecast Valid:
2pm EST Jan 17, 2026-6pm EST Jan 23, 2026
 
Forecast Discussion
 
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Additional Resources

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High Temperature

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Chance of Precipitation