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

40°F

4°C

Humidity 65%
Wind Speed NW 10 mph
Barometer 30.14 in (1021.8 mb)
Dewpoint 29°F (-2°C)
Visibility 10.00 mi
Wind Chill34°F (1°C)
Last update 6 Apr 1:53 am EDT
Extended Forecast for

Castle Shannon PA

  • Overnight

    Overnight: Partly cloudy, with a low around 35. West wind 9 to 13 mph.

    Low: 35 °F

    Partly Cloudy

  • Monday

    Monday: Scattered showers after 10am. Increasing clouds, with a high near 52. Southwest wind 8 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.

    High: 52 °F

    Scattered
    Showers

  • Monday Night

    Monday Night: Isolated showers before 2am. Mostly cloudy, with a low around 32. West wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.

    Low: 32 °F

    Isolated
    Showers

  • 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 27. North wind around 6 mph becoming northeast after midnight.

    Low: 27 °F

    Mostly Clear

  • Wednesday

    Wednesday: Sunny, with a high near 60.

    High: 60 °F

    Sunny

  • Wednesday Night

    Wednesday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Thursday

    Thursday: Mostly sunny, with a high near 68.

    High: 68 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 47.

    Low: 47 °F

    Partly Cloudy

Detailed Forecast

Overnight
Partly cloudy, with a low around 35. West wind 9 to 13 mph.
Monday
Scattered showers after 10am. Increasing clouds, with a high near 52. Southwest wind 8 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.
Monday Night
Isolated showers before 2am. Mostly cloudy, with a low around 32. West wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 20%.
Tuesday
Mostly sunny, with a high near 43. Northwest wind 11 to 14 mph.
Tuesday Night
Mostly clear, with a low around 27. North wind around 6 mph becoming northeast after midnight.
Wednesday
Sunny, with a high near 60.
Wednesday Night
Partly cloudy, with a low around 39.
Thursday
Mostly sunny, with a high near 68.
Thursday Night
Partly cloudy, with a low around 47.
Friday
A chance of showers after 2pm. Mostly sunny, with a high near 72. Chance of precipitation is 30%.
Friday Night
A chance of showers. Mostly cloudy, with a low around 51. Chance of precipitation is 30%.
Saturday
Mostly sunny, with a high near 72.
Saturday Night
Partly cloudy, with a low around 53.
Sunday
Partly sunny, with a high near 81.
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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:
2:21 am EDT Apr 6, 2026
Forecast Valid:
2am EDT Apr 6, 2026-6pm EDT Apr 12, 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