Cahokia Weather Forecast

    • 70
    • 93

    Rain Showers Likely

    • 63
    • 83

    Slight Chance Rain Showers

    • 67
    • 86

    Partly Sunny

    • 69
    • 87

    Rain Showers Likely

    • 67
    • 86

    Rain Showers

    • 63
    • 82

    Slight Chance Rain Showers

    • 65
    • 83

    Partly Sunny

Today 17 Jun St. Clair

Sunny with a slight chance of Showers and Thunderstorms. Some Thunderstorms may be severe with damaging Winds, large Hail, and Tornadoes. Windy, warmer. Near steady temperature around 90. Southwest Winds 20 to 30 Mph with Gusts up to 50 Mph. Chance of rain 20 percent.

Tonight 17 Jun St. Clair

Mostly cloudy. Numerous Showers and Thunderstorms this evening. Some Thunderstorms may be severe with damaging Winds, large Hail, and Tornadoes. Lows in the upper 60s. West Winds 15 to 20 Mph. Gusts up to 45 Mph this evening. Chance of rain 70 percent.

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Cahokia Temperature Statistics

June Temperature

St. Louis Downtown Airport (1.9 miles)

  • Lowest 3 June, 2026

    52.6 °F

  • Average June

    76 °F

  • Highest 10 June, 2026

    93.7 °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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