National Oceanic and Atmospheric Administration National Weather Service United States Department of Commerce

Hazardous Weather Conditions

Current conditions at

Pittsburgh - Allegheny County Airport (KAGC)

Lat: 40.36°NLon: 79.92°WElev: 1237ft.

Light Rain Fog/Mist

60°F

16°C

Humidity 90%
Wind Speed SW 12 mph
Barometer 30.04 in (1017.7 mb)
Dewpoint 57°F (14°C)
Visibility 6.00 mi
Last update 5 Mar 12:53 pm EST
Extended Forecast for

Upper St. Clair PA

  • This Afternoon

    This Afternoon: Rain and possibly a thunderstorm. High near 64. Southwest wind 9 to 11 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 64 °F

    Rain

  • Tonight

    Tonight: Rain and thunderstorms before 10pm, then a chance of rain between 10pm and midnight. Low around 55. Southwest wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    Low: 55 °F

    Rain then
    Mostly Cloudy

  • Friday

    Friday: A chance of rain, mainly between noon and 2pm. Mostly cloudy, with a high near 70. South wind 5 to 8 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.

    High: 70 °F

    Mostly Cloudy
    then Chance
    Rain

  • Friday Night

    Friday Night: A slight chance of rain after 1am. Partly cloudy, with a low around 58. South wind 6 to 9 mph. Chance of precipitation is 20%.

    Low: 58 °F

    Partly Cloudy
    then Slight
    Chance Rain

  • Saturday

    Saturday: A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 1pm. High near 76. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.

    High: 76 °F

    Chance Rain
    then Rain and
    Breezy

  • Saturday Night

    Saturday Night: Rain and possibly a thunderstorm. Low around 48. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 48 °F

    Rain

  • Sunday

    Sunday: Mostly sunny, with a high near 59.

    High: 59 °F

    Mostly Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 45.

    Low: 45 °F

    Mostly Clear

  • Monday

    Monday: Sunny, with a high near 70.

    High: 70 °F

    Sunny

Detailed Forecast

This Afternoon
Rain and possibly a thunderstorm. High near 64. Southwest wind 9 to 11 mph. Chance of precipitation is 100%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Tonight
Rain and thunderstorms before 10pm, then a chance of rain between 10pm and midnight. Low around 55. Southwest wind 5 to 10 mph. Chance of precipitation is 80%. New precipitation amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Friday
A chance of rain, mainly between noon and 2pm. Mostly cloudy, with a high near 70. South wind 5 to 8 mph. Chance of precipitation is 30%. New precipitation amounts of less than a tenth of an inch possible.
Friday Night
A slight chance of rain after 1am. Partly cloudy, with a low around 58. South wind 6 to 9 mph. Chance of precipitation is 20%.
Saturday
A chance of rain and thunderstorms, then rain and possibly a thunderstorm after 1pm. High near 76. Breezy, with a southwest wind 10 to 20 mph, with gusts as high as 31 mph. Chance of precipitation is 90%. New rainfall amounts between a tenth and quarter of an inch, except higher amounts possible in thunderstorms.
Saturday Night
Rain and possibly a thunderstorm. Low around 48. Chance of precipitation is 90%. New precipitation amounts between a quarter and half of an inch possible.
Sunday
Mostly sunny, with a high near 59.
Sunday Night
Mostly clear, with a low around 45.
Monday
Sunny, with a high near 70.
Monday Night
A chance of rain after 1am. Partly cloudy, with a low around 52. Chance of precipitation is 30%.
Tuesday
A chance of rain. Partly sunny, with a high near 72. Chance of precipitation is 40%.
Tuesday Night
A chance of rain. Mostly cloudy, with a low around 59. Chance of precipitation is 50%.
Wednesday
Rain likely. Mostly cloudy, with a high near 74. Breezy. Chance of precipitation is 70%.
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ABOUT THIS FORECAST

 
Point Forecast:
Upper St. Clair PA
 40.33°N 80.06°W (Elev. 1099 ft)
Last Update:
12:26 pm EST Mar 5, 2026
Forecast Valid:
1pm EST Mar 5, 2026-6pm EDT Mar 11, 2026
 
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