Cahokia Weather Forecast

    • 77
    • 95

    Increasing Clouds

    • 68
    • 97

    Rain Showers

    • 67
    • 86

    Mostly Sunny

    • 71
    • 89

    Rain Showers Likely

    • 64
    • 83

    Chance Thunderstorms

    • 62
    • 80

    Slight Chance Thunderstorms

Today 10 Jun St. Clair

Mostly sunny. Highs in the lower 90s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Heat index Values up to 102.

Tonight 10 Jun St. Clair

Partly cloudy. A slight chance of Showers and Thunderstorms in the evening. Lows in the mid 70s. South Winds 10 to 15 Mph. Chance of rain 20 percent. Heat index Values up to 100 early in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cahokia Temperature Statistics

June Temperature

St. Louis Downtown Airport (1.9 miles)

  • Lowest 3 June, 2026

    52.6 °F

  • Average June

    75.6 °F

  • Highest 7 June, 2026

    90.6 °F

Climate (2021–Present)

St. Louis Downtown Airport (1.9 miles)

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  • Average Low 2021–2026

    47.6 °F

  • Average 2021–2026

    58.4 °F

  • Average High 2021–2026

    69.3 °F
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