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.

Light Snow

27°F

-3°C

Humidity 75%
Wind Speed NW 6 mph
Barometer 30.10 in (1021.0 mb)
Dewpoint 20°F (-7°C)
Visibility 8.00 mi
Wind Chill20°F (-7°C)
Last update 12 Feb 12:53 am EST
Extended Forecast for

Castle Shannon PA

  • Overnight

    Overnight: Scattered snow showers, mainly after 2am. Mostly cloudy, with a low around 23. West wind around 10 mph. Chance of precipitation is 30%. Total nighttime snow accumulation of less than a half inch possible.

    Low: 23 °F

    Scattered
    Snow Showers

  • Thursday

    Thursday: Scattered snow showers, mainly before 9am. Mostly cloudy, with a high near 28. Northwest wind 10 to 13 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.

    High: 28 °F

    Scattered
    Snow Showers

  • Thursday Night

    Thursday Night: Mostly cloudy, with a low around 17. Northwest wind 5 to 7 mph.

    Low: 17 °F

    Mostly Cloudy

  • Friday

    Friday: Mostly sunny, with a high near 35. Southwest wind 3 to 7 mph.

    High: 35 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Mostly clear, with a low around 26. Southwest wind 6 to 8 mph.

    Low: 26 °F

    Mostly Clear

  • Saturday

    Saturday: Mostly sunny, with a high near 45.

    High: 45 °F

    Mostly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 29.

    Low: 29 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of rain. Mostly cloudy, with a high near 44. Chance of precipitation is 40%.

    High: 44 °F

    Chance Rain

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 31.

    Low: 31 °F

    Partly Cloudy

Detailed Forecast

Overnight
Scattered snow showers, mainly after 2am. Mostly cloudy, with a low around 23. West wind around 10 mph. Chance of precipitation is 30%. Total nighttime snow accumulation of less than a half inch possible.
Thursday
Scattered snow showers, mainly before 9am. Mostly cloudy, with a high near 28. Northwest wind 10 to 13 mph. Chance of precipitation is 30%. New snow accumulation of less than a half inch possible.
Thursday Night
Mostly cloudy, with a low around 17. Northwest wind 5 to 7 mph.
Friday
Mostly sunny, with a high near 35. Southwest wind 3 to 7 mph.
Friday Night
Mostly clear, with a low around 26. Southwest wind 6 to 8 mph.
Saturday
Mostly sunny, with a high near 45.
Saturday Night
Mostly cloudy, with a low around 29.
Sunday
A chance of rain. Mostly cloudy, with a high near 44. Chance of precipitation is 40%.
Sunday Night
Partly cloudy, with a low around 31.
Washington's Birthday
Mostly sunny, with a high near 46.
Monday Night
Partly cloudy, with a low around 30.
Tuesday
Partly sunny, with a high near 52.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 40. Chance of precipitation is 30%.
Wednesday
A chance of rain. Mostly cloudy, with a high near 56. Chance of precipitation is 50%.
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:
11:23 pm EST Feb 11, 2026
Forecast Valid:
1am EST Feb 12, 2026-6pm EST Feb 18, 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