Lake St Louis Weather Forecast

    • 46
    • 75

    Mostly Sunny

    • 48
    • 77

    Sunny

    • 47
    • 76

    Mostly Sunny

    • 49
    • 77

    Mostly Cloudy

    • 49
    • 79

    Mostly Cloudy

    • 49
    • 77

    Mostly Cloudy

    • 47
    • 70

    Mostly Cloudy

Today 21 Oct St. Charles

Mostly sunny. Highs in the lower 70s.

Tonight 21 Oct St. Charles

Mostly clear. Lows in the upper 40s. Light and variable Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake St Louis Temperature Statistics

October Temperature

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

  • Lowest 18 October, 2026

    35.1 °F

  • Average October

    64.4 °F

  • Highest 13 October, 2026

    93.7 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    57.6 °F

  • Average High 2021–2026

    69 °F
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