Cahokia Weather Forecast

    • 40
    • 55

    Slight Chance Rain

    • 26
    • 42

    Breezy

    • 34
    • 39

    Mostly Cloudy

    • 23
    • 44

    Mostly Cloudy

    • 11
    • 34

    Mostly Cloudy

    • 15
    • 25

    Partly Sunny

    • 26
    • 39

    Chance Rain

Today 9 Dec St. Clair

Partly sunny. Not as cool with Highs in the mid 50s. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 9 Dec St. Clair

Mostly cloudy. A slight chance of rain after midnight. Not as cool. Near steady temperature in the mid 40s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 20 percent.

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Cahokia Temperature Statistics

December Temperature

St. Louis Downtown Airport (1.9 miles)

  • Lowest 5 December, 2025

    10 °F

  • Average December

    29 °F

  • Highest 6 December, 2025

    48.9 °F

Climate (2020–Present)

St. Louis Downtown Airport (1.9 miles)

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  • Average Low 2020–2025

    47.5 °F

  • Average 2020–2025

    58 °F

  • Average High 2020–2025

    68.6 °F
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