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

23°F

-5°C

Humidity 78%
Wind Speed W 8 mph
Barometer 30.14 in (1022.9 mb)
Dewpoint 17°F (-8°C)
Visibility 8.00 mi
Wind Chill14°F (-10°C)
Last update 3 Feb 6:53 am EST
Extended Forecast for

Castle Shannon PA

  • Today

    Today: A slight chance of snow before 4pm, then a chance of flurries after 5pm. Mostly cloudy, with a high near 30. Calm wind becoming west around 5 mph. Chance of precipitation is 20%.

    High: 30 °F

    Slight Chance
    Snow

  • Tonight

    Tonight: A chance of flurries before 7pm. Mostly cloudy, with a low around 6. Northwest wind 3 to 6 mph.

    Low: 6 °F

    Chance
    Flurries

  • Wednesday

    Wednesday: Mostly sunny, with a high near 24. Wind chill values as low as -1. North wind 3 to 6 mph.

    High: 24 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 5. Northwest wind 3 to 5 mph.

    Low: 5 °F

    Mostly Cloudy

  • Thursday

    Thursday: Partly sunny, with a high near 22. West wind 3 to 7 mph.

    High: 22 °F

    Partly Sunny

  • Thursday Night

    Thursday Night: A chance of snow showers after 1am. Mostly cloudy, with a low around 13. Chance of precipitation is 30%.

    Low: 13 °F

    Mostly Cloudy
    then Chance
    Snow Showers

  • Friday

    Friday: Snow showers. High near 32. Chance of precipitation is 90%.

    High: 32 °F

    Snow Showers

  • Friday Night

    Friday Night: A chance of snow showers before 1am. Mostly cloudy, with a low around 8. Chance of precipitation is 50%.

    Low: 8 °F

    Chance Snow
    Showers

  • Saturday

    Saturday: Partly sunny, with a high near 18.

    High: 18 °F

    Partly Sunny

Detailed Forecast

Today
A slight chance of snow before 4pm, then a chance of flurries after 5pm. Mostly cloudy, with a high near 30. Calm wind becoming west around 5 mph. Chance of precipitation is 20%.
Tonight
A chance of flurries before 7pm. Mostly cloudy, with a low around 6. Northwest wind 3 to 6 mph.
Wednesday
Mostly sunny, with a high near 24. Wind chill values as low as -1. North wind 3 to 6 mph.
Wednesday Night
Mostly cloudy, with a low around 5. Northwest wind 3 to 5 mph.
Thursday
Partly sunny, with a high near 22. West wind 3 to 7 mph.
Thursday Night
A chance of snow showers after 1am. Mostly cloudy, with a low around 13. Chance of precipitation is 30%.
Friday
Snow showers. High near 32. Chance of precipitation is 90%.
Friday Night
A chance of snow showers before 1am. Mostly cloudy, with a low around 8. Chance of precipitation is 50%.
Saturday
Partly sunny, with a high near 18.
Saturday Night
Mostly cloudy, with a low around 4.
Sunday
Partly sunny, with a high near 19.
Sunday Night
Partly cloudy, with a low around -2.
Monday
Mostly sunny, with a high near 23.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Castle Shannon PA
 40.35°N 80.03°W (Elev. 1198 ft)
Last Update:
5:28 am EST Feb 3, 2026
Forecast Valid:
7am EST Feb 3, 2026-6pm EST Feb 9, 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