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.

Mostly Cloudy

55°F

13°C

Humidity 62%
Wind Speed NW 14 G 29 mph
Barometer 29.43 in (996.7 mb)
Dewpoint 42°F (6°C)
Visibility 10.00 mi
Wind Chill51°F (11°C)
Last update 16 Nov 2:53 am EST
Extended Forecast for

Castle Shannon PA

  • Overnight

    Overnight: Mostly cloudy, with a low around 40. Northwest wind around 16 mph, with gusts as high as 28 mph.

    Low: 40 °F

    Mostly Cloudy

  • Sunday

    Sunday: A chance of sprinkles before 7am. Partly sunny, with a high near 46. Breezy, with a northwest wind 15 to 22 mph, with gusts as high as 33 mph.

    High: 46 °F

    Chance
    Sprinkles and
    Breezy

  • Sunday Night

    Sunday Night: Partly cloudy, with a low around 32. West wind around 14 mph, with gusts as high as 25 mph.

    Low: 32 °F

    Partly Cloudy

  • Monday

    Monday: Mostly sunny, with a high near 43. West wind 14 to 17 mph.

    High: 43 °F

    Mostly Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 27. Southwest wind 5 to 7 mph.

    Low: 27 °F

    Mostly Clear

  • Tuesday

    Tuesday: A chance of showers, mainly after 1pm. Mostly cloudy, with a high near 42. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.

    High: 42 °F

    Slight Chance
    Showers then
    Chance
    Showers

  • Tuesday Night

    Tuesday Night: Showers likely, mainly before 1am. Cloudy, with a low around 36. Chance of precipitation is 70%.

    Low: 36 °F

    Showers
    Likely

  • Wednesday

    Wednesday: A chance of showers after 1pm. Mostly cloudy, with a high near 53. Chance of precipitation is 30%.

    High: 53 °F

    Mostly Cloudy
    then Chance
    Showers

  • Wednesday Night

    Wednesday Night: A chance of showers. Mostly cloudy, with a low around 43. Chance of precipitation is 40%.

    Low: 43 °F

    Chance
    Showers

Detailed Forecast

Overnight
Mostly cloudy, with a low around 40. Northwest wind around 16 mph, with gusts as high as 28 mph.
Sunday
A chance of sprinkles before 7am. Partly sunny, with a high near 46. Breezy, with a northwest wind 15 to 22 mph, with gusts as high as 33 mph.
Sunday Night
Partly cloudy, with a low around 32. West wind around 14 mph, with gusts as high as 25 mph.
Monday
Mostly sunny, with a high near 43. West wind 14 to 17 mph.
Monday Night
Mostly clear, with a low around 27. Southwest wind 5 to 7 mph.
Tuesday
A chance of showers, mainly after 1pm. Mostly cloudy, with a high near 42. Chance of precipitation is 50%. New precipitation amounts of less than a tenth of an inch possible.
Tuesday Night
Showers likely, mainly before 1am. Cloudy, with a low around 36. Chance of precipitation is 70%.
Wednesday
A chance of showers after 1pm. Mostly cloudy, with a high near 53. Chance of precipitation is 30%.
Wednesday Night
A chance of showers. Mostly cloudy, with a low around 43. Chance of precipitation is 40%.
Thursday
A chance of showers after 1pm. Mostly cloudy, with a high near 58. Chance of precipitation is 40%.
Thursday Night
Showers likely. Mostly cloudy, with a low around 48. Chance of precipitation is 70%.
Friday
Showers likely. Mostly cloudy, with a high near 62. Chance of precipitation is 70%.
Friday Night
Showers likely. Mostly cloudy, with a low around 44. Chance of precipitation is 60%.
Saturday
A chance of showers. Mostly cloudy, with a high near 53. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Castle Shannon PA
 40.35°N 80.03°W (Elev. 1198 ft)
Last Update:
1:52 am EST Nov 16, 2025
Forecast Valid:
3am EST Nov 16, 2025-6pm EST Nov 22, 2025
 
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