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

44°F

7°C

Humidity 73%
Wind Speed W 9 mph
Barometer 30.06 in (1019.1 mb)
Dewpoint 36°F (2°C)
Visibility 10.00 mi
Wind Chill39°F (4°C)
Last update 8 Nov 3:53 am EST
Extended Forecast for

Upper St. Clair PA

  • Today

    Today: Mostly cloudy through mid morning, then gradual clearing, with a high near 58. Southwest wind 8 to 17 mph, with gusts as high as 28 mph.

    High: 58 °F

    Becoming
    Sunny

  • Tonight

    Tonight: Increasing clouds, with a low around 41. West wind 11 to 14 mph, with gusts as high as 24 mph.

    Low: 41 °F

    Increasing
    Clouds

  • Monday

    Monday: Mostly cloudy, with a high near 57. West wind 11 to 16 mph.

    High: 57 °F

    Mostly Cloudy

  • Monday Night

    Monday Night: Partly cloudy, with a low around 37. Calm wind becoming southwest 5 to 8 mph after midnight.

    Low: 37 °F

    Partly Cloudy

  • Tuesday

    Tuesday: Sunny, with a high near 63. Southwest wind 10 to 15 mph.

    High: 63 °F

    Sunny

  • Tuesday Night

    Tuesday Night: Mostly clear, with a low around 39.

    Low: 39 °F

    Mostly Clear

  • Veterans Day

    Veterans Day: Mostly sunny, with a high near 61.

    High: 61 °F

    Mostly Sunny

  • Wednesday Night

    Wednesday Night: A chance of rain after 1am. Mostly cloudy, with a low around 40. Chance of precipitation is 30%.

    Low: 40 °F

    Mostly Cloudy
    then Chance
    Rain

  • Thursday

    Thursday: Rain likely, mainly after 1pm. Mostly cloudy, with a high near 53. Chance of precipitation is 60%.

    High: 53 °F

    Rain Likely

Detailed Forecast

Today
Mostly cloudy through mid morning, then gradual clearing, with a high near 58. Southwest wind 8 to 17 mph, with gusts as high as 28 mph.
Tonight
Increasing clouds, with a low around 41. West wind 11 to 14 mph, with gusts as high as 24 mph.
Monday
Mostly cloudy, with a high near 57. West wind 11 to 16 mph.
Monday Night
Partly cloudy, with a low around 37. Calm wind becoming southwest 5 to 8 mph after midnight.
Tuesday
Sunny, with a high near 63. Southwest wind 10 to 15 mph.
Tuesday Night
Mostly clear, with a low around 39.
Veterans Day
Mostly sunny, with a high near 61.
Wednesday Night
A chance of rain after 1am. Mostly cloudy, with a low around 40. Chance of precipitation is 30%.
Thursday
Rain likely, mainly after 1pm. Mostly cloudy, with a high near 53. Chance of precipitation is 60%.
Thursday Night
A chance of rain before 4am, then a chance of rain and snow. Mostly cloudy, with a low around 33. Chance of precipitation is 50%.
Friday
A chance of rain and snow. Mostly cloudy, with a high near 46. Chance of precipitation is 30%.
Friday Night
Mostly cloudy, with a low around 31.
Saturday
Partly sunny, with a high near 50.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Upper St. Clair PA
 40.33°N 80.11°W (Elev. 899 ft)
Last Update:
1:21 am EST Nov 8, 2026
Forecast Valid:
4am EST Nov 8, 2026-6pm EST Nov 14, 2026
 
Forecast Discussion
 
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Additional Resources

Radar & Satellite Image

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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