Cahokia Weather Forecast

    • 70
    • 86

    Chance Thunderstorms

    • 69
    • 88

    Slight Chance Thunderstorms

    • 70
    • 88

    Mostly Sunny

    • 74
    • 93

    Mostly Sunny

    • 75
    • 96

    Rain Showers Likely

    • 72
    • 91

    Chance Thunderstorms

    • 71
    • 91

    Slight Chance Thunderstorms

Today 5 Jul St. Clair

Partly sunny with a chance of Showers and Thunderstorms. Near steady temperature in the mid 80s. North Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 5 Jul St. Clair

Partly cloudy. A slight chance of Showers and Thunderstorms this evening. Patchy fog after midnight. Lows in the upper 60s. North Winds around 5 Mph. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Cahokia Temperature Statistics

July Temperature

St. Louis Downtown Airport (1.9 miles)

  • Lowest 2 July, 2026

    72.6 °F

  • Average July

    84.7 °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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