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.

Light Rain

42°F

6°C

Humidity 85%
Wind Speed SW 12 mph
Barometer 29.59 in (1002.7 mb)
Dewpoint 38°F (3°C)
Visibility 7.00 mi
Wind Chill35°F (2°C)
Last update 14 Jan 7:53 am EST
Extended Forecast for

Castle Shannon PA

  • Today

    Today: Rain. High near 45. Southwest wind around 11 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 45 °F

    Rain

  • Tonight

    Tonight: Snow, mainly before 3am. Low around 16. Northwest wind 11 to 16 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.

    Low: 16 °F

    Snow then
    Snow Likely

  • Thursday

    Thursday: Snow showers likely, mainly before 1pm. Mostly cloudy, with a high near 21. West wind 15 to 17 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.

    High: 21 °F

    Snow Showers
    Likely

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 15. West wind 9 to 13 mph.

    Low: 15 °F

    Partly Cloudy

  • Friday

    Friday: Snow likely, mainly after 1pm. Mostly cloudy, with a high near 33. South wind 10 to 16 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.

    High: 33 °F

    Snow Likely

  • Friday Night

    Friday Night: A chance of snow. Mostly cloudy, with a low around 27. Chance of precipitation is 50%.

    Low: 27 °F

    Chance Snow

  • Saturday

    Saturday: Snow likely. Mostly cloudy, with a high near 35. Chance of precipitation is 70%.

    High: 35 °F

    Snow Likely

  • Saturday Night

    Saturday Night: A chance of snow before 1am. Mostly cloudy, with a low around 12. Chance of precipitation is 30%.

    Low: 12 °F

    Chance Snow

  • Sunday

    Sunday: Partly sunny, with a high near 22.

    High: 22 °F

    Partly Sunny

Detailed Forecast

Today
Rain. High near 45. Southwest wind around 11 mph becoming northwest in the afternoon. Winds could gust as high as 21 mph. Chance of precipitation is 100%. New precipitation amounts between a tenth and quarter of an inch possible.
Tonight
Snow, mainly before 3am. Low around 16. Northwest wind 11 to 16 mph. Chance of precipitation is 90%. New snow accumulation of around an inch possible.
Thursday
Snow showers likely, mainly before 1pm. Mostly cloudy, with a high near 21. West wind 15 to 17 mph. Chance of precipitation is 60%. New snow accumulation of less than one inch possible.
Thursday Night
Partly cloudy, with a low around 15. West wind 9 to 13 mph.
Friday
Snow likely, mainly after 1pm. Mostly cloudy, with a high near 33. South wind 10 to 16 mph. Chance of precipitation is 60%. New snow accumulation of less than a half inch possible.
Friday Night
A chance of snow. Mostly cloudy, with a low around 27. Chance of precipitation is 50%.
Saturday
Snow likely. Mostly cloudy, with a high near 35. Chance of precipitation is 70%.
Saturday Night
A chance of snow before 1am. Mostly cloudy, with a low around 12. Chance of precipitation is 30%.
Sunday
Partly sunny, with a high near 22.
Sunday Night
A chance of snow after 1am. Mostly cloudy, with a low around 13. Chance of precipitation is 30%.
M.L.King Day
A chance of snow. Mostly cloudy, with a high near 25. Chance of precipitation is 50%.
Monday Night
A chance of snow. Mostly cloudy, with a low around 10. Chance of precipitation is 30%.
Tuesday
Partly sunny, with a high near 20.
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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:
6:06 am EST Jan 14, 2026
Forecast Valid:
8am EST Jan 14, 2026-6pm EST Jan 20, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation