St. Clair Weather Forecast

    • 39
    • 64

    Mostly Sunny

    • 38
    • 66

    Mostly Sunny

    • 38
    • 67

    Mostly Sunny

    • 45
    • 69

    Partly Sunny

    • 45
    • 66

    Mostly Cloudy

    • 47
    • 69

    Partly Sunny

    • 47
    • 71

    Partly Sunny

Today 23 Oct Allegheny

Partly cloudy. Highs in the upper 60s.

Tonight 23 Oct Allegheny

Clear. Lows in the upper 30s. East Winds around 5 Mph.

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St. Clair Temperature Statistics

October Temperature

Pittsburgh - Allegheny County Airport (4.3 miles)

  • Lowest 18 October, 2026

    30.9 °F

  • Average October

    58.1 °F

  • Highest 13 October, 2026

    82 °F

Climate (2021–2026)

Pittsburgh - Allegheny County Airport (4.3 miles)

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  • Average Low 2021–2026

    45.9 °F

  • Average 2021–2026

    54.6 °F

  • Average High 2021–2026

    63.2 °F
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