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Hazardous Weather Conditions

Current conditions at

Pittsburgh - Allegheny County Airport (KAGC)

Lat: 40.36°NLon: 79.92°WElev: 1237ft.

Light Rain Fog/Mist

63°F

17°C

Humidity 90%
Wind Speed NW 18 G 37 mph
Barometer 29.82 in (1009.6 mb)
Dewpoint 60°F (16°C)
Visibility 4.00 mi
Last update 16 Oct 1:53 pm EDT
Extended Forecast for

Upper St. Clair PA

Freeze Watch October 18, 01:00am until October 18, 09:00am
Click here for hazard details and duration
Freeze Watch

  • This Afternoon

    This Afternoon: Showers likely, mainly before 4pm. Cloudy, with a steady temperature around 61. Light northwest wind becoming west 5 to 10 mph. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    High: 61 °F

    Showers
    Likely

  • Tonight

    Tonight: Showers likely, mainly between 10pm and midnight. Mostly cloudy, with a low around 40. North wind 13 to 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.

    Low: 40 °F

    Showers
    Likely then
    Mostly Cloudy

  • Saturday

    Saturday: Partly sunny, then gradually becoming sunny, with a high near 52. North wind 13 to 16 mph.

    High: 52 °F

    Becoming
    Sunny

  • Saturday Night

    Saturday Night: Patchy frost after midnight. Otherwise, clear, with a low around 32. North wind 5 to 7 mph becoming calm after midnight.

    Low: 32 °F

    Clear then
    Patchy Frost

  • Sunday

    Sunday: Widespread frost, mainly before 9am. Otherwise, sunny, with a high near 59. Calm wind becoming east around 5 mph in the afternoon.

    High: 59 °F

    Frost then
    Sunny

  • Sunday Night

    Sunday Night: Mostly clear, with a low around 36.

    Low: 36 °F

    Mostly Clear

  • Monday

    Monday: Areas of frost before 9am. Otherwise, sunny, with a high near 62.

    High: 62 °F

    Areas Frost
    then Sunny

  • Monday Night

    Monday Night: Mostly clear, with a low around 38.

    Low: 38 °F

    Mostly Clear

  • Tuesday

    Tuesday: Sunny, with a high near 66.

    High: 66 °F

    Sunny

Detailed Forecast

This Afternoon
Showers likely, mainly before 4pm. Cloudy, with a steady temperature around 61. Light northwest wind becoming west 5 to 10 mph. Winds could gust as high as 20 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Tonight
Showers likely, mainly between 10pm and midnight. Mostly cloudy, with a low around 40. North wind 13 to 15 mph. Chance of precipitation is 60%. New precipitation amounts of less than a tenth of an inch possible.
Saturday
Partly sunny, then gradually becoming sunny, with a high near 52. North wind 13 to 16 mph.
Saturday Night
Patchy frost after midnight. Otherwise, clear, with a low around 32. North wind 5 to 7 mph becoming calm after midnight.
Sunday
Widespread frost, mainly before 9am. Otherwise, sunny, with a high near 59. Calm wind becoming east around 5 mph in the afternoon.
Sunday Night
Mostly clear, with a low around 36.
Monday
Areas of frost before 9am. Otherwise, sunny, with a high near 62.
Monday Night
Mostly clear, with a low around 38.
Tuesday
Sunny, with a high near 66.
Tuesday Night
Mostly clear, with a low around 42.
Wednesday
Sunny, with a high near 66.
Wednesday Night
Mostly clear, with a low around 44.
Thursday
Sunny, with a high near 67.
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Forecast Area
Tiles ©ESRI

ABOUT THIS FORECAST

 
Point Forecast:
Upper St. Clair PA
 40.33°N 80.06°W (Elev. 1099 ft)
Last Update:
2:21 pm EDT Oct 16, 2026
Forecast Valid:
2pm EDT Oct 16, 2026-6pm EDT Oct 22, 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