St. Clair Weather Forecast

    • 18
    • 35

    Increasing Clouds

    • 2
    • 25

    Mostly Cloudy

    • 10
    • 15

    Snow

    • 10
    • 24

    Snow Likely

    • 3
    • 19

    Slight Chance Snow

    • 9
    • 19

    Mostly Cloudy

Today 22 Jan Allegheny

Partly sunny in the Morning, then clearing. Near steady temperature in the lower 30s. West Winds 10 to 15 Mph with Gusts up to 30 Mph.

Tonight 22 Jan Allegheny

Partly cloudy in the Evening, then becoming mostly cloudy. Lows around 17. West Winds 5 to 10 Mph with Gusts up to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

St. Clair Temperature Statistics

January Temperature

Pittsburgh - Allegheny County Airport (4.3 miles)

  • Lowest 19 January, 2026

    6.1 °F

  • Average January

    31.3 °F

  • Highest 9 January, 2026

    64.9 °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

    63.3 °F
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