St. Clair Weather Forecast

    • 57
    • 79

    Slight Chance Thunderstorms

    • 60
    • 82

    Rain Showers

    • 47
    • 69

    Rain Showers Likely

    • 45
    • 65

    Partly Sunny

    • 53
    • 73

    Rain Showers

    • 53
    • 71

    Rain Showers

    • 47
    • 68

    Chance Rain Showers

Today 23 Apr Allegheny

Mostly sunny and warm. Near steady temperature in the upper 70s. West Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 23 Apr Allegheny

Mainly clear. A slight chance of Showers this evening. Mild. Lows in the upper 50s. Southwest Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

St. Clair Temperature Statistics

April Temperature

Pittsburgh - Allegheny County Airport (4.3 miles)

  • Lowest 8 April, 2026

    26.1 °F

  • Average April

    58.8 °F

  • Highest 15 April, 2026

    82.9 °F

Climate (2021–Present)

Pittsburgh - Allegheny County Airport (4.3 miles)

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    54.6 °F

  • Average High 2021–2026

    63.4 °F
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