Cahokia Weather Forecast

    • 48
    • 72

    Mostly Sunny

    • 47
    • 73

    Mostly Sunny

    • 49
    • 77

    Sunny

    • 49
    • 76

    Mostly Sunny

    • 52
    • 77

    Mostly Cloudy

    • 52
    • 78

    Mostly Cloudy

Today 20 Oct St. Clair

Sunny. Highs in the lower 70s. Southeast Winds around 5 Mph.

Tonight 20 Oct St. Clair

Mostly clear. Lows in the upper 40s. East Winds around 5 Mph in the Evening, becoming light and variable.

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Cahokia Temperature Statistics

October Temperature

St. Louis Downtown Airport (1.9 miles)

  • Lowest 18 October, 2026

    36 °F

  • Average October

    66 °F

  • Highest 13 October, 2026

    94.6 °F

Climate (2021–2026)

St. Louis Downtown Airport (1.9 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    58.7 °F

  • Average High 2021–2026

    69.5 °F
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