Cahokia Weather Forecast

    • 57
    • 81

    Rain Showers Likely

    • 47
    • 70

    Becoming Sunny

    • 52
    • 75

    Sunny

    • 59
    • 84

    Chance Rain Showers

    • 52
    • 78

    Sunny

    • 58
    • 77

    Slight Chance Thunderstorms

    • 65
    • 87

    Partly Sunny

Today 9 May St. Clair

Sunny. Highs around 80. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 9 May St. Clair

Partly cloudy this Evening, then becoming mostly cloudy. A chance of Thunderstorms. Showers Likely, mainly this evening. Lows in the mid 50s. West Winds 5 to 10 Mph, becoming north after midnight. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cahokia Temperature Statistics

May Temperature

St. Louis Downtown Airport (1.9 miles)

  • Lowest 7 May, 2026

    39.9 °F

  • Average May

    57.7 °F

  • Highest 4 May, 2026

    79.6 °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

    69.2 °F
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