Lake St Louis Weather Forecast

    • 54
    • 85

    Rain Showers Likely

    • 59
    • 75

    Mostly Sunny

    • 50
    • 72

    Chance Rain Showers

    • 51
    • 76

    Mostly Sunny

    • 53
    • 78

    Partly Sunny

    • 56
    • 78

    Slight Chance Rain Showers

Today 3 Sep St. Charles

Sunny. Highs in the mid 80s. West Winds 5 to 10 Mph.

Tonight 3 Sep St. Charles

Mostly cloudy. Numerous Showers and scattered Thunderstorms in the Evening, then scattered Showers with isolated Thunderstorms after midnight. Lows in the mid 50s. Northwest Winds 5 to 10 Mph. Chance of rain 70 percent.

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Lake St Louis Temperature Statistics

September Temperature

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

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  • Average September

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Climate (2020–Present)

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

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  • Average Low 2020–2025

    45.9 °F

  • Average 2020–2025

    56.9 °F

  • Average High 2020–2025

    68.1 °F
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