Cahokia Weather Forecast

    • 76
    • 93

    Chance Thunderstorms

    • 76
    • 96

    Mostly Sunny

    • 70
    • 95

    Rain Showers

    • 66
    • 87

    Partly Sunny

    • 69
    • 88

    Chance Thunderstorms

    • 65
    • 84

    Chance Thunderstorms

    • 62
    • 81

    Slight Chance Thunderstorms

Today 9 Jun St. Clair

Mostly sunny with a chance of Showers and Thunderstorms. Near steady temperature in the upper 80s. Southwest Winds 5 to 10 Mph. Chance of rain 30 percent. Heat index Values up to 107.

Tonight 9 Jun St. Clair

Partly cloudy with a slight chance of Showers and Thunderstorms this Evening, then clear after midnight. Lows in the mid 70s. Southwest Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values up to 108 early this 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 °F

  • Highest 7 June, 2026

    88 °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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