Lake St Louis Weather Forecast

    • 58
    • 64

    Chance Rain Showers

    • 17
    • 71

    Rain Showers

    • 17
    • 27

    Partly Sunny

    • 26
    • 35

    Partly Sunny

    • 23
    • 44

    Partly Sunny

    • 13
    • 34

    Partly Sunny

Today 27 Dec St. Charles

Cloudy with a slight chance of Thunderstorms. A chance of rain in the Morning, then rain in the afternoon. Highs in the lower 70s. Temperature falling into the mid 60s in the afternoon. Southwest Winds 15 to 20 Mph. Chance of rain 90 percent.

Tonight 27 Dec St. Charles

Mostly cloudy with rain likely in the Evening, then partly cloudy after midnight. Breezy and much cooler. Less humid with Lows around 20. Northwest Winds 15 to 25 Mph with Gusts up to 35 Mph. Chance of rain 70 percent. Wind chill Values as low as 5 above after midnight.

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Lake St Louis Temperature Statistics

December Temperature

St. Louis, Spirit Of St. Louis Airport (10.6 miles)

  • Lowest 14 December, 2025

    7 °F

  • Average December

    35.3 °F

  • Highest 23 December, 2025

    68 °F

Climate (2020–Present)

St. Louis, Spirit Of St. Louis Airport (10.6 miles)

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  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    57.1 °F

  • Average High 2020–2025

    68.3 °F
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