Cahokia Weather Forecast

    • 73
    • 92

    Mostly Sunny

    • 76
    • 95

    Mostly Sunny

    • 78
    • 97

    Hot

    • 77
    • 97

    Chance Rain Showers

    • 74
    • 94

    Chance Thunderstorms

    • 71
    • 88

    Chance Thunderstorms

Today 8 Aug St. Clair

Sunny. Highs around 90. West Winds around 5 Mph. Heat index Values up to 101.

Tonight 8 Aug St. Clair

Mostly clear. Humid with Lows in the lower 70s. Southeast Winds around 5 Mph. Heat index Values up to 100 early in the evening.

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  • Temperature Real-Time

Cahokia Temperature Statistics

August Temperature

St. Louis Downtown Airport (1.9 miles)

  • Lowest 3 August, 2026

    63.6 °F

  • Average August

    75.8 °F

  • Highest 4 August, 2026

    89.7 °F

Climate (2021–2026)

St. Louis Downtown Airport (1.9 miles)

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  • Average Low 2021–2026

    47.7 °F

  • Average 2021–2026

    58.5 °F

  • Average High 2021–2026

    69.3 °F
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