Upper St Clair Weather Forecast

    • 65
    • 84

    Chance Thunderstorms

    • 61
    • 82

    Rain Showers Likely

    • 57
    • 76

    Partly Sunny

    • 46
    • 83

    Rain Showers Likely

    • 34
    • 59

    Chance Rain Showers

    • 34
    • 52

    Mostly Sunny

Today 15 Apr Allegheny

Partly cloudy with a chance of Showers and Thunderstorms. Unseasonably warm with Highs in the mid 80s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 40 percent.

Tonight 15 Apr Allegheny

Mostly cloudy. A chance of Showers and Thunderstorms in the Evening, then a slight chance of Showers after midnight. Mild. Lows in the mid 60s. Southwest Winds 5 to 10 Mph. Chance of rain 50 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Upper St Clair Temperature Statistics

April Temperature

Pittsburgh - Allegheny County Airport (8.1 miles)

  • Lowest 8 April, 2026

    26.1 °F

  • Average April

    56.8 °F

  • Highest 4 April, 2026

    82 °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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