Upper St Clair Weather Forecast

    • 68
    • 85

    Mostly Cloudy

    • 72
    • 87

    Mostly Cloudy

    • 72
    • 90

    Partly Sunny

    • 72
    • 91

    Partly Sunny

    • 68
    • 88

    Rain Showers Likely

    • 65
    • 82

    Chance Rain Showers

Today 30 Aug Allegheny

Partly cloudy in the Morning, then becoming partly sunny. Humid with Highs in the mid 80s. South Winds 5 to 10 Mph, becoming west in the afternoon.

Tonight 30 Aug Allegheny

Mostly cloudy. Humid with Lows in the upper 60s. Northwest Winds around 5 Mph, becoming southeast after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Upper St Clair Temperature Statistics

August Temperature

Pittsburgh - Allegheny County Airport (8.1 miles)

  • Lowest 24 August, 2026

    55.9 °F

  • Average August

    71.4 °F

  • Highest 4 August, 2026

    86 °F

Climate (2021–2026)

Pittsburgh - Allegheny County Airport (8.1 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    54.6 °F

  • Average High 2021–2026

    63.3 °F
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