Cahokia Weather Forecast

    • 59
    • 73

    Mostly Cloudy

    • 57
    • 78

    Partly Sunny

    • 58
    • 79

    Mostly Sunny

    • 66
    • 81

    Chance Rain Showers

    • 66
    • 80

    Chance Rain Showers

    • 64
    • 78

    Chance Rain Showers

Today 26 Sep St. Clair

Mostly cloudy. A chance of Sprinkles in the morning. Highs in the lower 70s. East Winds around 5 Mph.

Tonight 26 Sep St. Clair

Mostly cloudy in the Evening, then becoming partly cloudy. Lows in the upper 50s. East Winds around 5 Mph in the Evening, becoming light and variable.

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  • Temperature Real-Time

Cahokia Temperature Statistics

September Temperature

St. Louis Downtown Airport (1.9 miles)

  • Lowest 23 September, 2026

    57 °F

  • Average September

    80.3 °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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