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

58°F

14°C

Humidity 81%
Wind Speed N 8 G 23 mph
Barometer 29.68 in (1005.3 mb)
Dewpoint 52°F (11°C)
Visibility 10.00 mi
Last update 22 Mar 9:53 pm EDT
Extended Forecast for

Castle Shannon PA

Severe T-storm Watch March 22, 10:47pm until March 23, 12:00am
Click here for hazard details and duration
Severe T-storm Watch
  •  
    Severe T-storm Watch March 22, 10:47pm until March 23, 12:00am

    NOW until 12:00am Mon

    Severe T-storm Watch

  • Tonight

    Low: 38 °F

    Severe
    Thunderstorms

  • Monday

    Monday: A chance of showers, mainly before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 44. Northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 44 °F

    Chance
    Showers

  • Monday Night

    Monday Night: Partly cloudy, with a low around 24. Northwest wind 5 to 14 mph.

    Low: 24 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Mostly sunny, with a high near 49. Light and variable wind.

    High: 49 °F

    Mostly Sunny

  • Tuesday Night

    Tuesday Night: Mostly cloudy, with a low around 34. Calm wind becoming south around 5 mph after midnight.

    Low: 34 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain after 2am. Mostly cloudy, with a low around 44. Chance of precipitation is 30%.

    Low: 44 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday

    Thursday: A chance of rain. Mostly cloudy, with a high near 67. Chance of precipitation is 30%.

    High: 67 °F

    Chance Rain

Detailed Forecast

Tonight
Showers and thunderstorms before 4am, then a chance of showers. Some of the storms could be severe. Low around 38. North wind 7 to 14 mph, with gusts as high as 28 mph. Chance of precipitation is 100%. New rainfall amounts between a quarter and half of an inch possible.
Monday
A chance of showers, mainly before 11am. Cloudy, then gradually becoming mostly sunny, with a high near 44. Northwest wind around 15 mph, with gusts as high as 25 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Monday Night
Partly cloudy, with a low around 24. Northwest wind 5 to 14 mph.
Tuesday
Mostly sunny, with a high near 49. Light and variable wind.
Tuesday Night
Mostly cloudy, with a low around 34. Calm wind becoming south around 5 mph after midnight.
Wednesday
Partly sunny, with a high near 60.
Wednesday Night
A chance of rain after 2am. Mostly cloudy, with a low around 44. Chance of precipitation is 30%.
Thursday
A chance of rain. Mostly cloudy, with a high near 67. Chance of precipitation is 30%.
Thursday Night
Rain. Low around 40. Chance of precipitation is 80%.
Friday
Rain likely, mainly before 8am. Partly sunny, with a high near 47. Chance of precipitation is 60%.
Friday Night
Partly cloudy, with a low around 25.
Saturday
Sunny, with a high near 46.
Saturday Night
Partly cloudy, with a low around 29.
Sunday
Mostly sunny, with a high near 55.
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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:
10:32 pm EDT Mar 22, 2026
Forecast Valid:
10pm EDT Mar 22, 2026-6pm EDT Mar 29, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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