Cahokia Weather Forecast

    • 69
    • 84

    Chance Thunderstorms

    • 69
    • 87

    Mostly Sunny

    • 70
    • 89

    Sunny

    • 73
    • 91

    Mostly Sunny

    • 74
    • 93

    Mostly Sunny

    • 76
    • 94

    Mostly Sunny

    • 77
    • 96

    Mostly Sunny

Today 11 Jul St. Clair

Showers with Thunderstorms likely. Near steady temperature in the upper 70s. North Winds 5 to 10 Mph. Chance of rain 90 percent.

Tonight 11 Jul St. Clair

Mostly clear. A chance of Showers and Thunderstorms this evening. Lows in the upper 60s. North Winds 5 to 10 Mph. Chance of rain 40 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

    81.1 °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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