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.

Overcast

49°F

9°C

Humidity 52%
Wind Speed NW 13 G 25 mph
Barometer 30.03 in (1017.9 mb)
Dewpoint 32°F (0°C)
Visibility 10.00 mi
Wind Chill44°F (7°C)
Last update 6 Apr 5:53 pm EDT
Extended Forecast for

Castle Shannon PA

  • Tonight

    Tonight: A chance of showers, mainly before 7pm. Partly cloudy, with a low around 31. West wind 10 to 14 mph. Chance of precipitation is 30%.

    Low: 31 °F

    Chance
    Showers then
    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 43. Northwest wind 11 to 14 mph.

    High: 43 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 25. North wind around 6 mph becoming northeast after midnight.

    Low: 25 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 60. Southeast wind 6 to 9 mph.

    High: 60 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 38. Southeast wind around 9 mph.

    Low: 38 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Friday

    Friday: Sunny, with a high near 73.

    High: 73 °F

    Sunny

  • Friday Night

    Friday Night: A chance of showers. Mostly cloudy, with a low around 50. Chance of precipitation is 30%.

    Low: 50 °F

    Chance
    Showers

Detailed Forecast

Tonight
A chance of showers, mainly before 7pm. Partly cloudy, with a low around 31. West wind 10 to 14 mph. Chance of precipitation is 30%.
Tuesday
Mostly sunny, with a high near 43. Northwest wind 11 to 14 mph.
Tuesday Night
Mostly clear, with a low around 25. North wind around 6 mph becoming northeast after midnight.
Wednesday
Sunny, with a high near 60. Southeast wind 6 to 9 mph.
Wednesday Night
Partly cloudy, with a low around 38. Southeast wind around 9 mph.
Thursday
Mostly sunny, with a high near 68.
Thursday Night
Mostly clear, with a low around 45.
Friday
Sunny, with a high near 73.
Friday Night
A chance of showers. Mostly cloudy, with a low around 50. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 66.
Saturday Night
Partly cloudy, with a low around 48.
Sunday
Partly sunny, with a high near 78.
Sunday Night
Mostly cloudy, with a low around 61.
Monday
Partly sunny, with a high near 82.
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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:
2:21 pm EDT Apr 6, 2026
Forecast Valid:
6pm EDT Apr 6, 2026-6pm EDT Apr 13, 2026
 
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