Cahokia Weather Forecast

    • 77
    • 97

    Hot

    • 78
    • 99

    Hot

    • 79
    • 99

    Hot

    • 78
    • 98

    Slight Chance Thunderstorms

    • 78
    • 97

    Chance Thunderstorms

    • 77
    • 96

    Chance Rain Showers

    • 75
    • 95

    Chance Thunderstorms

Today 29 Jun St. Clair

Mostly sunny. Hot. Near steady temperature in the lower 90s. South Winds 10 to 15 Mph. Heat index Values up to 110.

Tonight 29 Jun St. Clair

Partly cloudy this Evening, then clearing. Lows in the mid 70s. South Winds 10 to 15 Mph. 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

    74.8 °F

  • Highest 10 June, 2026

    93.7 °F

Climate (2021–2026)

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

    69.2 °F
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