National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce
Current conditions at

Pittsburgh - Allegheny County Airport (KAGC)

Lat: 40.36°NLon: 79.92°WElev: 1237ft.

Fair

40°F

4°C

Humidity 65%
Wind Speed W 6 mph
Barometer 30.13 in (1021.0 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 6 Nov 3:53 am EST
Extended Forecast for

Castle Shannon PA

  • Today

    Today: Sunny, with a high near 53. Northwest wind 8 to 11 mph.

    High: 53 °F

    Sunny

  • Tonight

    Tonight: Mostly cloudy, with a low around 36. Calm wind becoming south 5 to 7 mph after midnight.

    Low: 36 °F

    Mostly Cloudy

  • Friday

    Friday: Rain, mainly after 1pm. High near 62. Breezy, with a south wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.

    High: 62 °F

    Slight Chance
    Rain then
    Rain and
    Breezy

  • Friday Night

    Friday Night: Showers and possibly a thunderstorm before 10pm, then rain, mainly between 10pm and 1am. Low around 47. Southwest wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 47 °F

    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 59. West wind 8 to 10 mph.

    High: 59 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Rain likely, mainly after 1am. Mostly cloudy, with a low around 44. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 44 °F

    Slight Chance
    Rain then
    Rain Likely

  • Sunday

    Sunday: Rain likely. Mostly cloudy, with a high near 52. Chance of precipitation is 70%.

    High: 52 °F

    Rain Likely

  • Sunday Night

    Sunday Night: A chance of rain and snow showers before 1am, then snow showers likely. Mostly cloudy, with a low around 29. Chance of precipitation is 60%.

    Low: 29 °F

    Rain/Snow
    Likely

  • Monday

    Monday: Snow showers likely. Mostly cloudy, with a high near 36. Chance of precipitation is 60%.

    High: 36 °F

    Snow Showers
    Likely

Detailed Forecast

Today
Sunny, with a high near 53. Northwest wind 8 to 11 mph.
Tonight
Mostly cloudy, with a low around 36. Calm wind becoming south 5 to 7 mph after midnight.
Friday
Rain, mainly after 1pm. High near 62. Breezy, with a south wind 10 to 15 mph increasing to 16 to 21 mph in the afternoon. Winds could gust as high as 32 mph. Chance of precipitation is 90%. New precipitation amounts between a tenth and quarter of an inch possible.
Friday Night
Showers and possibly a thunderstorm before 10pm, then rain, mainly between 10pm and 1am. Low around 47. Southwest wind 9 to 14 mph, with gusts as high as 24 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday
Partly sunny, with a high near 59. West wind 8 to 10 mph.
Saturday Night
Rain likely, mainly after 1am. Mostly cloudy, with a low around 44. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Sunday
Rain likely. Mostly cloudy, with a high near 52. Chance of precipitation is 70%.
Sunday Night
A chance of rain and snow showers before 1am, then snow showers likely. Mostly cloudy, with a low around 29. Chance of precipitation is 60%.
Monday
Snow showers likely. Mostly cloudy, with a high near 36. Chance of precipitation is 60%.
Monday Night
A chance of snow showers. Mostly cloudy, with a low around 26. Chance of precipitation is 50%.
Veterans Day
Partly sunny, with a high near 41.
Tuesday Night
Mostly cloudy, with a low around 33.
Wednesday
Mostly sunny, with a high near 50. Breezy.
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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:
12:27 am EST Nov 6, 2025
Forecast Valid:
4am EST Nov 6, 2025-6pm EST Nov 12, 2025
 
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Additional Resources

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High Temperature

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Chance of Precipitation