Upper St Clair Weather Forecast

    • 51
    • 74

    Mostly Sunny

    • 52
    • 75

    Partly Sunny

    • 51
    • 73

    Mostly Sunny

    • 53
    • 76

    Mostly Sunny

    • 59
    • 81

    Mostly Sunny

    • 64
    • 84

    Chance Rain Showers

Today 31 May Allegheny

Sunny. Highs in the mid 70s. Northeast Winds around 5 Mph.

Tonight 31 May Allegheny

Clear. Lows around 50. North Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Upper St Clair Temperature Statistics

May Temperature

Pittsburgh - Allegheny County Airport (8.1 miles)

  • Lowest 2 May, 2026

    34 °F

  • Average May

    58.9 °F

  • Highest 18 May, 2026

    87.1 °F

Climate (2021–Present)

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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