Wentzville Weather Forecast

    • 37
    • 53

    Decreasing Clouds

    • 25
    • 44

    Breezy

    • 28
    • 40

    Mostly Cloudy

    • 17
    • 41

    Mostly Cloudy

    • 8
    • 27

    Mostly Cloudy

    • 13
    • 23

    Partly Sunny

Today 9 Dec St. Charles

Mostly sunny. Not as cool with Highs in the lower 50s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 9 Dec St. Charles

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 35 Mph. Chance of rain 20 percent.

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Wentzville Temperature Statistics

December Temperature

St. Louis, Spirit Of St. Louis Airport (14.9 miles)

  • Lowest 5 December, 2025

    10 °F

  • Average December

    27.5 °F

  • Highest 6 December, 2025

    48.9 °F

Climate (2020–Present)

St. Louis, Spirit Of St. Louis Airport (14.9 miles)

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  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    57.1 °F

  • Average High 2020–2025

    68.2 °F
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