Cahokia Weather Forecast

    • 66
    • 96

    Rain Showers

    • 66
    • 86

    Chance Thunderstorms

    • 69
    • 86

    Rain Showers

    • 61
    • 80

    Partly Sunny

    • 61
    • 80

    Partly Sunny

    • 65
    • 84

    Slight Chance Thunderstorms

    • 71
    • 90

    Mostly Sunny

Today 11 Jun St. Clair

Sunny. Near steady temperature in the lower 90s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Heat index Values up to 106.

Tonight 11 Jun St. Clair

Showers with a chance of Thunderstorms this Evening, then partly cloudy after midnight. Some Thunderstorms may be severe with damaging Winds and large hail. Lows in the lower 60s. West Winds 15 to 20 Mph with Gusts up to 30 Mph, becoming northwest 5 to 10 Mph after midnight. Chance of rain near 100 percent. Heat index Values up to 103 early this evening.

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Cahokia Temperature Statistics

June Temperature

St. Louis Downtown Airport (1.9 miles)

  • Lowest 3 June, 2026

    52.6 °F

  • Average June

    76.7 °F

  • Highest 9 June, 2026

    91.9 °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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