Cahokia Weather Forecast

    • 70
    • 89

    Increasing Clouds

    • 71
    • 86

    Rain Showers

    • 67
    • 81

    Chance Thunderstorms

    • 67
    • 84

    Mostly Sunny

    • 69
    • 86

    Slight Chance Thunderstorms

    • 70
    • 89

    Slight Chance Thunderstorms

Today 30 Jul St. Clair

Sunny. Highs in the upper 80s. East Winds around 5 Mph.

Tonight 30 Jul St. Clair

Partly cloudy. Lows in the upper 60s. Southeast Winds around 5 Mph.

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Cahokia Temperature Statistics

July Temperature

St. Louis Downtown Airport (1.9 miles)

  • Lowest 23 July, 2026

    61.6 °F

  • Average July

    80.7 °F

  • Highest 26 July, 2026

    97.6 °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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