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Hazardous Weather Conditions

Current conditions at

Pittsburgh - Allegheny County Airport (KAGC)

Lat: 40.36°NLon: 79.92°WElev: 1237ft.

Fair

61°F

16°C

Humidity 81%
Wind Speed S 8 mph
Barometer 29.88 in (1011.8 mb)
Dewpoint 55°F (13°C)
Visibility 10.00 mi
Last update 11 Mar 3:53 am EDT
Extended Forecast for

Upper St. Clair PA

  • Overnight

    Overnight: Rain likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 58. South wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.

    Low: 58 °F

    Rain Likely

  • Wednesday

    Wednesday: Rain and thunderstorms before 4pm, then showers and thunderstorms likely between 4pm and 5pm, then showers and possibly a thunderstorm after 5pm. High near 75. Breezy, with a southwest wind 14 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.

    High: 75 °F

    Showers then
    T-storms and
    Breezy

  • Wednesday Night

    Wednesday Night: Showers and possibly a thunderstorm before 11pm, then a chance of showers. Low around 33. Southwest wind around 18 mph becoming northwest after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.

    Low: 33 °F

    Showers then
    Chance
    Showers

  • Thursday

    Thursday: Cloudy, then gradually becoming mostly sunny, with a high near 44. Northwest wind around 17 mph, with gusts as high as 28 mph.

    High: 44 °F

    Decreasing
    Clouds

  • Thursday Night

    Thursday Night: Partly cloudy, with a low around 32. West wind 6 to 8 mph becoming south after midnight.

    Low: 32 °F

    Partly Cloudy

  • Friday

    Friday: A slight chance of rain after 2pm. Mostly cloudy, with a high near 55. Windy. Chance of precipitation is 20%.

    High: 55 °F

    Mostly Cloudy
    and Breezy
    then Slight
    Chance Rain
    and Windy

  • Friday Night

    Friday Night: Partly cloudy, with a low around 30.

    Low: 30 °F

    Partly Cloudy

  • Saturday

    Saturday: Partly sunny, with a high near 47.

    High: 47 °F

    Partly Sunny

  • Saturday Night

    Saturday Night: Mostly cloudy, with a low around 37.

    Low: 37 °F

    Mostly Cloudy

Detailed Forecast

Overnight
Rain likely and possibly a thunderstorm after 5am. Mostly cloudy, with a low around 58. South wind around 11 mph, with gusts as high as 21 mph. Chance of precipitation is 60%. New rainfall amounts of less than a tenth of an inch, except higher amounts possible in thunderstorms.
Wednesday
Rain and thunderstorms before 4pm, then showers and thunderstorms likely between 4pm and 5pm, then showers and possibly a thunderstorm after 5pm. High near 75. Breezy, with a southwest wind 14 to 20 mph, with gusts as high as 33 mph. Chance of precipitation is 100%. New rainfall amounts between a half and three quarters of an inch possible.
Wednesday Night
Showers and possibly a thunderstorm before 11pm, then a chance of showers. Low around 33. Southwest wind around 18 mph becoming northwest after midnight. Winds could gust as high as 34 mph. Chance of precipitation is 100%. New precipitation amounts between a quarter and half of an inch possible.
Thursday
Cloudy, then gradually becoming mostly sunny, with a high near 44. Northwest wind around 17 mph, with gusts as high as 28 mph.
Thursday Night
Partly cloudy, with a low around 32. West wind 6 to 8 mph becoming south after midnight.
Friday
A slight chance of rain after 2pm. Mostly cloudy, with a high near 55. Windy. Chance of precipitation is 20%.
Friday Night
Partly cloudy, with a low around 30.
Saturday
Partly sunny, with a high near 47.
Saturday Night
Mostly cloudy, with a low around 37.
Sunday
Mostly cloudy, with a high near 66. Breezy.
Sunday Night
Rain. Low around 35. Breezy. Chance of precipitation is 90%.
Monday
Rain and snow. High near 46. Breezy. Chance of precipitation is 80%.
Monday Night
Mostly cloudy, with a low around 21.
Tuesday
Partly sunny, with a high near 32.
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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:
4:07 am EDT Mar 11, 2026
Forecast Valid:
4am EDT Mar 11, 2026-6pm EDT Mar 17, 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