Cahokia Weather Forecast

    • 58
    • 76

    Decreasing Clouds

    • 60
    • 79

    Mostly Cloudy

    • 57
    • 81

    Mostly Cloudy

    • 58
    • 77

    Mostly Cloudy

    • 60
    • 81

    Partly Sunny

    • 62
    • 84

    Partly Sunny

Today 23 Sep St. Clair

Partly sunny. Highs in the mid 70s. North Winds 5 to 10 Mph.

Tonight 23 Sep St. Clair

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the upper 50s. Northeast Winds 5 to 10 Mph.

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Cahokia Temperature Statistics

September Temperature

St. Louis Downtown Airport (1.9 miles)

  • Lowest 8 September, 2026

    59.6 °F

  • Average September

    82.2 °F

  • Highest 5 September, 2026

    102.7 °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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