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

40°F

4°C

Humidity 93%
Wind Speed W 6 mph
Barometer 30.02 in (1017.3 mb)
Dewpoint 38°F (3°C)
Visibility 10.00 mi
Wind Chill36°F (2°C)
Last update 19 Apr 8:53 am EDT
Extended Forecast for

Castle Shannon PA

  • Today

    Today: Partly sunny, with a high near 52. West wind 14 to 18 mph, with gusts as high as 31 mph.

    High: 52 °F

    Partly Sunny

  • Tonight

    Tonight: A chance of showers, mainly before 1am. Mostly cloudy, with a low around 33. West wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 33 °F

    Chance
    Showers

  • Monday

    Monday: Mostly sunny, with a high near 46. Northwest wind 10 to 14 mph.

    High: 46 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 28. Northwest wind 5 to 7 mph becoming calm after midnight.

    Low: 28 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 64. Southwest wind 6 to 13 mph, with gusts as high as 23 mph.

    High: 64 °F

    Sunny

  • Tuesday Night

    Tuesday Night: A chance of showers, mainly after 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 52 °F

    Chance
    Showers

  • Wednesday

    Wednesday: A chance of showers. Partly sunny, with a high near 70. Chance of precipitation is 40%.

    High: 70 °F

    Chance
    Showers

  • Wednesday Night

    Wednesday Night: Mostly clear, with a low around 48.

    Low: 48 °F

    Mostly Clear

  • Thursday

    Thursday: Sunny, with a high near 77.

    High: 77 °F

    Sunny

Detailed Forecast

Today
Partly sunny, with a high near 52. West wind 14 to 18 mph, with gusts as high as 31 mph.
Tonight
A chance of showers, mainly before 1am. Mostly cloudy, with a low around 33. West wind around 10 mph, with gusts as high as 22 mph. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Monday
Mostly sunny, with a high near 46. Northwest wind 10 to 14 mph.
Monday Night
Mostly clear, with a low around 28. Northwest wind 5 to 7 mph becoming calm after midnight.
Tuesday
Sunny, with a high near 64. Southwest wind 6 to 13 mph, with gusts as high as 23 mph.
Tuesday Night
A chance of showers, mainly after 2am. Mostly cloudy, with a low around 52. Chance of precipitation is 40%. New precipitation amounts of less than a tenth of an inch possible.
Wednesday
A chance of showers. Partly sunny, with a high near 70. Chance of precipitation is 40%.
Wednesday Night
Mostly clear, with a low around 48.
Thursday
Sunny, with a high near 77.
Thursday Night
Partly cloudy, with a low around 56.
Friday
Mostly sunny, with a high near 82.
Friday Night
A chance of showers. Mostly cloudy, with a low around 58. Chance of precipitation is 40%.
Saturday
Showers likely. Mostly cloudy, with a high near 74. Chance of precipitation is 60%.
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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 19, 2026
Forecast Valid:
9am EDT Apr 19, 2026-6pm EDT Apr 25, 2026
 
Forecast Discussion
 
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Additional Resources

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Hourly Weather Forecast

National Digital Forecast Database

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation