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

45°F

7°C

Humidity 71%
Wind Speed W 8 G 23 mph
Barometer 30.07 in (1019.2 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill41°F (5°C)
Last update 7 Nov 5:53 pm EST
Extended Forecast for

Upper St. Clair PA

  • Tonight

    Tonight: Mostly cloudy, then gradually becoming mostly clear, with a low around 36. West wind 6 to 10 mph, with gusts as high as 20 mph.

    Low: 36 °F

    Decreasing
    Clouds

  • Sunday

    Sunday: Partly sunny, then gradually becoming sunny, with a high near 57. Southwest wind 8 to 18 mph, with gusts as high as 28 mph.

    High: 57 °F

    Becoming
    Sunny

  • Sunday Night

    Sunday Night: Increasing clouds, with a low around 40. West wind 13 to 15 mph.

    Low: 40 °F

    Increasing
    Clouds

  • Monday

    Monday: Mostly cloudy, then gradually becoming sunny, with a high near 56. West wind 11 to 17 mph.

    High: 56 °F

    Decreasing
    Clouds

  • Monday Night

    Monday Night: Partly cloudy, with a low around 35. Southwest wind 3 to 8 mph.

    Low: 35 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 63.

    High: 63 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Partly cloudy, with a low around 39.

    Low: 39 °F

    Partly Cloudy

  • Veterans Day

    Veterans Day: Partly sunny, with a high near 60.

    High: 60 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain after 1am. Mostly cloudy, with a low around 39. Chance of precipitation is 30%.

    Low: 39 °F

    Mostly Cloudy
    then Chance
    Rain

Detailed Forecast

Tonight
Mostly cloudy, then gradually becoming mostly clear, with a low around 36. West wind 6 to 10 mph, with gusts as high as 20 mph.
Sunday
Partly sunny, then gradually becoming sunny, with a high near 57. Southwest wind 8 to 18 mph, with gusts as high as 28 mph.
Sunday Night
Increasing clouds, with a low around 40. West wind 13 to 15 mph.
Monday
Mostly cloudy, then gradually becoming sunny, with a high near 56. West wind 11 to 17 mph.
Monday Night
Partly cloudy, with a low around 35. Southwest wind 3 to 8 mph.
Tuesday
Sunny, with a high near 63.
Tuesday Night
Partly cloudy, with a low around 39.
Veterans Day
Partly sunny, with a high near 60.
Wednesday Night
A chance of rain after 1am. Mostly cloudy, with a low around 39. Chance of precipitation is 30%.
Thursday
A chance of rain. Mostly cloudy, with a high near 54. Chance of precipitation is 50%.
Thursday Night
A chance of rain. Mostly cloudy, with a low around 33. Chance of precipitation is 50%.
Friday
A chance of rain. Mostly cloudy, with a high near 46. Chance of precipitation is 40%.
Friday Night
A chance of rain and snow. Mostly cloudy, with a low around 30. Chance of precipitation is 30%.
Saturday
Partly sunny, with a high near 48.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Upper St. Clair PA
 40.31°N 80.09°W (Elev. 1099 ft)
Last Update:
5:56 pm EST Nov 7, 2026
Forecast Valid:
6pm EST Nov 7, 2026-6pm EST Nov 14, 2026
 
Forecast Discussion
 
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Additional Resources

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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