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

48°F

9°C

Humidity 61%
Wind Speed W 9 G 21 mph
Barometer 30.12 in (1020.9 mb)
Dewpoint 35°F (2°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 3 Nov 9:53 pm EST
Extended Forecast for

Castle Shannon PA

  • Tonight

    Tonight: Clear, with a low around 37. West wind 10 to 13 mph, with gusts as high as 23 mph.

    Low: 37 °F

    Clear

  • Tuesday

    Tuesday: Sunny, with a high near 56. West wind 9 to 11 mph.

    High: 56 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 40. South wind 6 to 9 mph.

    Low: 40 °F

    Partly Cloudy

  • Wednesday

    Wednesday: A chance of rain after 1pm. Mostly sunny, with a high near 63. Breezy, with a southwest wind 13 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 63 °F

    Breezy. Sunny
    then Chance
    Rain

  • Wednesday Night

    Wednesday Night: A chance of rain before 1am. Partly cloudy, with a low around 39. Northwest wind 9 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 39 °F

    Chance Rain

  • Thursday

    Thursday: Mostly sunny, with a high near 53.

    High: 53 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 37.

    Low: 37 °F

    Partly Cloudy

  • Friday

    Friday: Rain after 1pm. High near 62. Chance of precipitation is 80%.

    High: 62 °F

    Mostly Cloudy
    then Rain

  • Friday Night

    Friday Night: Rain, mainly before 1am. Low around 45. Chance of precipitation is 80%.

    Low: 45 °F

    Rain

Detailed Forecast

Tonight
Clear, with a low around 37. West wind 10 to 13 mph, with gusts as high as 23 mph.
Tuesday
Sunny, with a high near 56. West wind 9 to 11 mph.
Tuesday Night
Partly cloudy, with a low around 40. South wind 6 to 9 mph.
Wednesday
A chance of rain after 1pm. Mostly sunny, with a high near 63. Breezy, with a southwest wind 13 to 22 mph, with gusts as high as 32 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday Night
A chance of rain before 1am. Partly cloudy, with a low around 39. Northwest wind 9 to 16 mph, with gusts as high as 28 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Thursday
Mostly sunny, with a high near 53.
Thursday Night
Partly cloudy, with a low around 37.
Friday
Rain after 1pm. High near 62. Chance of precipitation is 80%.
Friday Night
Rain, mainly before 1am. Low around 45. Chance of precipitation is 80%.
Saturday
A chance of rain before 1pm. Mostly cloudy, with a high near 52. Chance of precipitation is 30%.
Saturday Night
A chance of rain. Mostly cloudy, with a low around 41. Chance of precipitation is 50%.
Sunday
Rain likely. Mostly cloudy, with a high near 53. Chance of precipitation is 70%.
Sunday Night
A chance of rain and snow. Mostly cloudy, with a low around 33. Chance of precipitation is 50%.
Monday
A chance of snow. Partly sunny, with a high near 41. Chance of precipitation is 30%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Castle Shannon PA
 40.35°N 80.03°W (Elev. 1198 ft)
Last Update:
7:27 pm EST Nov 3, 2025
Forecast Valid:
10pm EST Nov 3, 2025-6pm EST Nov 10, 2025
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

Link to Local Radar Data Link to Satellite Data

Hourly Weather Forecast

National Digital Forecast Database

National Digital Forecast Database Maximum Temperature Forecast

High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation