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

17°F

-8°C

Humidity 77%
Wind Speed S 7 mph
Barometer 29.79 in (1011.3 mb)
Dewpoint 11°F (-12°C)
Visibility 10.00 mi
Wind Chill7°F (-14°C)
Last update 2 Jan 2:53 am EST
Extended Forecast for

Castle Shannon PA

  • Overnight

    Overnight: Cloudy, with a low around 14. Southwest wind around 6 mph.

    Low: 14 °F

    Cloudy

  • Friday

    Friday: Mostly cloudy, then gradually becoming sunny, with a high near 28. West wind 6 to 11 mph.

    High: 28 °F

    Decreasing
    Clouds

  • Friday Night

    Friday Night: Mostly cloudy, with a low around 15. West wind 3 to 6 mph.

    Low: 15 °F

    Mostly Cloudy

  • Saturday

    Saturday: Mostly cloudy, with a high near 27. Calm wind.

    High: 27 °F

    Mostly Cloudy

  • Saturday Night

    Saturday Night: A slight chance of snow before 1am. Mostly cloudy, with a low around 19. Light and variable wind. Chance of precipitation is 20%.

    Low: 19 °F

    Slight Chance
    Snow

  • Sunday

    Sunday: Mostly cloudy, with a high near 30.

    High: 30 °F

    Mostly Cloudy

  • Sunday Night

    Sunday Night: Mostly cloudy, with a low around 16.

    Low: 16 °F

    Mostly Cloudy

  • Monday

    Monday: Mostly cloudy, with a high near 39.

    High: 39 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Mostly cloudy, with a low around 32.

    Low: 32 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Cloudy, with a low around 14. Southwest wind around 6 mph.
Friday
Mostly cloudy, then gradually becoming sunny, with a high near 28. West wind 6 to 11 mph.
Friday Night
Mostly cloudy, with a low around 15. West wind 3 to 6 mph.
Saturday
Mostly cloudy, with a high near 27. Calm wind.
Saturday Night
A slight chance of snow before 1am. Mostly cloudy, with a low around 19. Light and variable wind. Chance of precipitation is 20%.
Sunday
Mostly cloudy, with a high near 30.
Sunday Night
Mostly cloudy, with a low around 16.
Monday
Mostly cloudy, with a high near 39.
Monday Night
Mostly cloudy, with a low around 32.
Tuesday
A chance of rain after 1pm. Mostly cloudy, with a high near 45. Chance of precipitation is 30%.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 38. Chance of precipitation is 40%.
Wednesday
Mostly cloudy, with a high near 49.
Wednesday Night
Mostly cloudy, with a low around 34.
Thursday
A chance of rain. Mostly cloudy, with a high near 50. Chance of precipitation is 30%.
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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:
12:43 am EST Jan 2, 2026
Forecast Valid:
3am EST Jan 2, 2026-6pm EST Jan 8, 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