Cahokia Weather Forecast

    • 73
    • 88

    Isolated Thunderstorms

    • 75
    • 95

    Thunderstorms

    • 73
    • 91

    Thunderstorms Likely

    • 71
    • 89

    Chance Thunderstorms

    • 70
    • 89

    Chance Rain Showers

    • 72
    • 90

    Mostly Sunny

    • 73
    • 93

    Mostly Sunny

Today 8 Jul St. Clair

Partly sunny with isolated Showers and Thunderstorms. Highs in the upper 80s. South Winds 5 to 10 Mph with Gusts up to 25 Mph. Chance of rain 20 percent.

Tonight 8 Jul St. Clair

Mostly clear. Isolated Showers and Thunderstorms in the evening. Lows in the lower 70s. South Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cahokia Temperature Statistics

July Temperature

St. Louis Downtown Airport (1.9 miles)

  • Lowest 5 July, 2026

    68.6 °F

  • Average July

    81.9 °F

  • Highest 2 July, 2026

    96.7 °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

    69.3 °F
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