Avoca Weather Forecast

    • 54
    • 69

    Increasing Clouds

    • 55
    • 67

    Rain Showers Likely

    • 53
    • 66

    Chance Rain Showers

    • 50
    • 62

    Mostly Cloudy

    • 52
    • 63

    Mostly Cloudy

    • 52
    • 67

    Chance Rain Showers

Today 18 Sep St. Clair

Mostly sunny in the Morning, then becoming partly cloudy. Highs around 70. Northeast Winds 5 to 15 Mph with Gusts up to 25 Mph.

Tonight 18 Sep St. Clair

Cloudy. A chance of Showers after midnight. Lows in the mid 50s. Northeast Winds up to 10 Mph. Chance of rain 40 percent.

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Avoca Temperature Statistics

September Temperature

St Clair County International Airport (13 miles)

  • Lowest 14 September, 2026

    48.2 °F

  • Average September

    68.8 °F

  • Highest 2 September, 2026

    95 °F

Climate (2021–2026)

St Clair County International Airport (13 miles)

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  • Average Low 2021–2026

    39.8 °F

  • Average 2021–2026

    49.5 °F

  • Average High 2021–2026

    58.8 °F
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