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

63°F

17°C

Humidity 65%
Wind Speed SW 17 G 29 mph
Barometer 29.86 in (1011.6 mb)
Dewpoint 51°F (11°C)
Visibility 10.00 mi
Last update 9 Jan 1:53 pm EST
Extended Forecast for

Castle Shannon PA

  • This Afternoon

    This Afternoon: A slight chance of showers after 4pm. Mostly cloudy, with a high near 63. Southwest wind 15 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.

    High: 63 °F

    Slight Chance
    Showers

  • Tonight

    Tonight: Mostly cloudy, with a low around 38. Northwest wind 9 to 14 mph becoming light and variable. Winds could gust as high as 24 mph.

    Low: 38 °F

    Mostly Cloudy

  • Saturday

    Saturday: Showers, mainly after 11am. High near 52. East wind 6 to 9 mph becoming south in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 52 °F

    Showers
    Likely then
    Showers

  • Saturday Night

    Saturday Night: Rain showers likely before 1am, then a slight chance of snow showers. Cloudy, then gradually becoming partly cloudy, with a low around 29. West wind 11 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    Low: 29 °F

    Showers
    Likely then
    Rain/Snow
    Likely

  • Sunday

    Sunday: Snow showers likely, mainly after 1pm. Mostly cloudy, with a high near 33. Breezy, with a west wind 15 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.

    High: 33 °F

    Snow Showers
    Likely and
    Breezy

  • Sunday Night

    Sunday Night: A slight chance of snow showers before 1am. Mostly cloudy, with a low around 25. Chance of precipitation is 20%.

    Low: 25 °F

    Slight Chance
    Snow Showers

  • Monday

    Monday: Mostly sunny, with a high near 36.

    High: 36 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Partly cloudy, with a low around 29.

    Low: 29 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 44.

    High: 44 °F

    Mostly Sunny

Detailed Forecast

This Afternoon
A slight chance of showers after 4pm. Mostly cloudy, with a high near 63. Southwest wind 15 to 18 mph, with gusts as high as 30 mph. Chance of precipitation is 20%.
Tonight
Mostly cloudy, with a low around 38. Northwest wind 9 to 14 mph becoming light and variable. Winds could gust as high as 24 mph.
Saturday
Showers, mainly after 11am. High near 52. East wind 6 to 9 mph becoming south in the afternoon. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Saturday Night
Rain showers likely before 1am, then a slight chance of snow showers. Cloudy, then gradually becoming partly cloudy, with a low around 29. West wind 11 to 15 mph, with gusts as high as 28 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Sunday
Snow showers likely, mainly after 1pm. Mostly cloudy, with a high near 33. Breezy, with a west wind 15 to 23 mph, with gusts as high as 37 mph. Chance of precipitation is 70%. New snow accumulation of less than a half inch possible.
Sunday Night
A slight chance of snow showers before 1am. Mostly cloudy, with a low around 25. Chance of precipitation is 20%.
Monday
Mostly sunny, with a high near 36.
Monday Night
Partly cloudy, with a low around 29.
Tuesday
Mostly sunny, with a high near 44.
Tuesday Night
A chance of showers after 1am. Mostly cloudy, with a low around 36. Chance of precipitation is 40%.
Wednesday
Showers likely. Mostly cloudy, with a high near 42. Chance of precipitation is 70%.
Wednesday Night
A chance of rain and snow showers. Mostly cloudy, with a low around 23. Chance of precipitation is 50%.
Thursday
A chance of snow showers. Partly sunny, with a high near 28. Chance of precipitation is 30%.
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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:
2:18 pm EST Jan 9, 2026
Forecast Valid:
2pm EST Jan 9, 2026-6pm EST Jan 15, 2026
 
Forecast Discussion
 
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Additional Resources

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Chance of Precipitation