Cahokia Weather Forecast

    • 63
    • 82

    Rain Showers Likely

    • 63
    • 83

    Chance Rain Showers

    • 66
    • 84

    Chance Rain Showers

    • 68
    • 83

    Rain Showers Likely

    • 69
    • 86

    Rain Showers Likely

    • 67
    • 85

    Rain Showers Likely

Today 23 May St. Clair

Mostly cloudy this Morning, then becoming mostly sunny. Not as cool with Highs in the lower 80s. West Winds around 5 Mph.

Tonight 23 May St. Clair

Mostly cloudy with Showers likely with a chance of Thunderstorms. Lows in the lower 60s. Southwest Winds around 5 Mph. Chance of rain 60 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

    39.7 °F

  • Average May

    63.8 °F

  • Highest 17 May, 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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