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

34°F

1°C

Humidity 64%
Wind Speed W 10 G 25 mph
Barometer 29.96 in (1015.7 mb)
Dewpoint 23°F (-5°C)
Visibility 10.00 mi
Wind Chill26°F (-3°C)
Last update 11 Feb 8:53 am EST
Extended Forecast for

Castle Shannon PA

  • Today

    Today: A chance of flurries between 3pm and 5pm, then a chance of flurries with a slight chance of snow after 5pm. Mostly cloudy, with a high near 33. West wind 13 to 15 mph, with gusts as high as 25 mph.

    High: 33 °F

    Mostly Cloudy
    then Slight
    Chance Snow

  • Tonight

    Tonight: A chance of snow, mainly between 3am and 5am. Mostly cloudy, with a low around 23. West wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

    Low: 23 °F

    Chance Snow

  • Thursday

    Thursday: A chance of flurries with a slight chance of snow before 7am, then a chance of flurries between 7am and 1pm. Mostly cloudy, with a high near 29. West wind around 11 mph, with gusts as high as 21 mph.

    High: 29 °F

    Slight Chance
    Snow then
    Mostly Cloudy

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 19. West wind 5 to 7 mph.

    Low: 19 °F

    Mostly Cloudy

  • Friday

    Friday: Partly sunny, with a high near 36. West wind 5 to 9 mph.

    High: 36 °F

    Partly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 25.

    Low: 25 °F

    Partly Cloudy

  • Saturday

    Saturday: Sunny, with a high near 42.

    High: 42 °F

    Sunny

  • Saturday Night

    Saturday Night: Partly cloudy, with a low around 26.

    Low: 26 °F

    Partly Cloudy

  • Sunday

    Sunday: A chance of rain after 1pm. Partly sunny, with a high near 44. Chance of precipitation is 30%.

    High: 44 °F

    Partly Sunny
    then Chance
    Rain

Detailed Forecast

Today
A chance of flurries between 3pm and 5pm, then a chance of flurries with a slight chance of snow after 5pm. Mostly cloudy, with a high near 33. West wind 13 to 15 mph, with gusts as high as 25 mph.
Tonight
A chance of snow, mainly between 3am and 5am. Mostly cloudy, with a low around 23. West wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Thursday
A chance of flurries with a slight chance of snow before 7am, then a chance of flurries between 7am and 1pm. Mostly cloudy, with a high near 29. West wind around 11 mph, with gusts as high as 21 mph.
Thursday Night
Mostly cloudy, with a low around 19. West wind 5 to 7 mph.
Friday
Partly sunny, with a high near 36. West wind 5 to 9 mph.
Friday Night
Partly cloudy, with a low around 25.
Saturday
Sunny, with a high near 42.
Saturday Night
Partly cloudy, with a low around 26.
Sunday
A chance of rain after 1pm. Partly sunny, with a high near 44. Chance of precipitation is 30%.
Sunday Night
A chance of rain before 1am. Mostly cloudy, with a low around 30. Chance of precipitation is 30%.
Washington's Birthday
Mostly sunny, with a high near 45.
Monday Night
Mostly cloudy, with a low around 30.
Tuesday
Partly sunny, with a high near 51.
Basemap Options
Click map to change the forecast location
Loading map...
Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castle Shannon PA
 40.37°N 80.02°W (Elev. 1109 ft)
Last Update:
3:44 am EST Feb 11, 2026
Forecast Valid:
9am EST Feb 11, 2026-6pm EST Feb 17, 2026
 
Forecast Discussion
 
Get as KML Get as XML

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