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

33°F

1°C

Humidity 56%
Wind Speed S 12 mph
Barometer 29.88 in (1013.6 mb)
Dewpoint 19°F (-7°C)
Visibility 10.00 mi
Wind Chill24°F (-4°C)
Last update 11 Nov 8:53 pm EST
Extended Forecast for

Upper St. Clair PA

  • Tonight

    Tonight: Mostly cloudy, with a low around 30. Southwest wind 13 to 17 mph, with gusts as high as 28 mph.

    Low: 30 °F

    Mostly Cloudy

  • Wednesday

    Wednesday: A slight chance of showers between 11am and 2pm. Cloudy, with a high near 46. Breezy, with a southwest wind 17 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.

    High: 46 °F

    Slight Chance
    Showers and
    Breezy

  • Wednesday Night

    Wednesday Night: Cloudy, then gradually becoming partly cloudy, with a low around 33. West wind 10 to 14 mph, with gusts as high as 24 mph.

    Low: 33 °F

    Decreasing
    Clouds

  • Thursday

    Thursday: Mostly sunny, with a high near 49. West wind 10 to 15 mph.

    High: 49 °F

    Mostly Sunny

  • Thursday Night

    Thursday Night: Mostly clear, with a low around 31. West wind around 7 mph.

    Low: 31 °F

    Mostly Clear

  • Friday

    Friday: Mostly sunny, with a high near 52.

    High: 52 °F

    Mostly Sunny

  • Friday Night

    Friday Night: Partly cloudy, with a low around 32.

    Low: 32 °F

    Partly Cloudy

  • Saturday

    Saturday: A chance of showers. Partly sunny, with a high near 56. Chance of precipitation is 30%.

    High: 56 °F

    Chance
    Showers

  • Saturday Night

    Saturday Night: Showers likely, mainly after 1am. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.

    Low: 46 °F

    Showers
    Likely

Detailed Forecast

Tonight
Mostly cloudy, with a low around 30. Southwest wind 13 to 17 mph, with gusts as high as 28 mph.
Wednesday
A slight chance of showers between 11am and 2pm. Cloudy, with a high near 46. Breezy, with a southwest wind 17 to 21 mph, with gusts as high as 31 mph. Chance of precipitation is 20%.
Wednesday Night
Cloudy, then gradually becoming partly cloudy, with a low around 33. West wind 10 to 14 mph, with gusts as high as 24 mph.
Thursday
Mostly sunny, with a high near 49. West wind 10 to 15 mph.
Thursday Night
Mostly clear, with a low around 31. West wind around 7 mph.
Friday
Mostly sunny, with a high near 52.
Friday Night
Partly cloudy, with a low around 32.
Saturday
A chance of showers. Partly sunny, with a high near 56. Chance of precipitation is 30%.
Saturday Night
Showers likely, mainly after 1am. Mostly cloudy, with a low around 46. Chance of precipitation is 60%.
Sunday
A chance of showers. Mostly cloudy, with a high near 59. Chance of precipitation is 50%.
Sunday Night
A chance of showers. Mostly cloudy, with a low around 38. Chance of precipitation is 40%.
Monday
Mostly sunny, with a high near 49.
Monday Night
A chance of showers. Mostly cloudy, with a low around 33. Chance of precipitation is 30%.
Tuesday
A chance of showers. Partly sunny, with a high near 50. Chance of precipitation is 40%.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Upper St. Clair PA
 40.33°N 80.09°W (Elev. 1178 ft)
Last Update:
6:23 pm EST Nov 11, 2025
Forecast Valid:
9pm EST Nov 11, 2025-6pm EST Nov 18, 2025
 
Forecast Discussion
 
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Additional Resources

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High Temperature

National Digital Forecast Database Weather Element Forecast

Chance of Precipitation