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.

Fair

32°F

0°C

Humidity 56%
Wind Speed S 5 mph
Barometer 30.10 in (1020.8 mb)
Dewpoint 18°F (-8°C)
Visibility 10.00 mi
Wind Chill27°F (-3°C)
Last update 17 Nov 11:53 pm EST
Extended Forecast for

Upper St. Clair PA

  • Overnight

    Overnight: Mostly clear, with a low around 27. Light southwest wind.

    Low: 27 °F

    Mostly Clear

  • Tuesday

    Tuesday: Rain and snow likely before 1pm, then rain. High near 41. Light and variable wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.

    High: 41 °F

    Chance
    Rain/Snow
    then Rain

  • Tuesday Night

    Tuesday Night: Rain, mainly before 2am. Low around 34. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 34 °F

    Rain then
    Chance Rain

  • Wednesday

    Wednesday: Partly sunny, with a high near 50. Light northeast wind.

    High: 50 °F

    Partly Sunny

  • Wednesday Night

    Wednesday Night: Mostly cloudy, with a low around 37. Calm wind.

    Low: 37 °F

    Mostly Cloudy

  • Thursday

    Thursday: Cloudy, with a high near 54.

    High: 54 °F

    Cloudy

  • Thursday Night

    Thursday Night: Rain likely, mainly after 1am. Cloudy, with a low around 44. Chance of precipitation is 70%.

    Low: 44 °F

    Chance Rain
    then Rain
    Likely

  • Friday

    Friday: Rain likely before 10am, then showers likely after 10am. Mostly cloudy, with a high near 59. Chance of precipitation is 60%.

    High: 59 °F

    Rain Likely

  • Friday Night

    Friday Night: Showers likely before 1am, then rain likely after 1am. Mostly cloudy, with a low around 40. Chance of precipitation is 60%.

    Low: 40 °F

    Showers
    Likely

Detailed Forecast

Overnight
Mostly clear, with a low around 27. Light southwest wind.
Tuesday
Rain and snow likely before 1pm, then rain. High near 41. Light and variable wind becoming southeast around 6 mph in the afternoon. Chance of precipitation is 80%. New snow accumulation of less than a half inch possible.
Tuesday Night
Rain, mainly before 2am. Low around 34. East wind around 5 mph becoming calm in the evening. Chance of precipitation is 80%. New precipitation amounts between a quarter and half of an inch possible.
Wednesday
Partly sunny, with a high near 50. Light northeast wind.
Wednesday Night
Mostly cloudy, with a low around 37. Calm wind.
Thursday
Cloudy, with a high near 54.
Thursday Night
Rain likely, mainly after 1am. Cloudy, with a low around 44. Chance of precipitation is 70%.
Friday
Rain likely before 10am, then showers likely after 10am. Mostly cloudy, with a high near 59. Chance of precipitation is 60%.
Friday Night
Showers likely before 1am, then rain likely after 1am. Mostly cloudy, with a low around 40. Chance of precipitation is 60%.
Saturday
A chance of rain before 1pm, then a chance of showers after 1pm. Partly sunny, with a high near 51. Chance of precipitation is 40%.
Saturday Night
Partly cloudy, with a low around 33.
Sunday
Mostly sunny, with a high near 52.
Sunday Night
Partly cloudy, with a low around 35.
Monday
Partly sunny, with a high near 55.
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Forecast Area
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ABOUT THIS FORECAST

 
Point Forecast:
Upper St. Clair PA
 40.33°N 80.06°W (Elev. 1099 ft)
Last Update:
12:17 am EST Nov 18, 2025
Forecast Valid:
12am EST Nov 18, 2025-6pm EST Nov 24, 2025
 
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