Cahokia Weather Forecast

    • 72
    • 91

    Increasing Clouds

    • 72
    • 90

    Rain Showers Likely

    • 61
    • 88

    Rain Showers

    • 54
    • 73

    Mostly Cloudy

    • 55
    • 73

    Mostly Cloudy

    • 59
    • 77

    Mostly Cloudy

Today 17 May St. Clair

Mostly sunny. Warmer with Highs in the upper 80s. South Winds 15 to 20 Mph with Gusts up to 30 Mph.

Tonight 17 May St. Clair

Mostly clear in the Evening, then becoming partly cloudy. Lows in the lower 70s. South Winds 15 to 20 Mph with Gusts up to 30 Mph.

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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

    60.8 °F

  • Highest 12 May, 2026

    83.6 °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

    69.3 °F
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