Lake St Louis Weather Forecast

    • 34
    • 50

    Chance Rain

    • 23
    • 47

    Partly Sunny

    • 25
    • 38

    Mostly Sunny

    • 39
    • 52

    Partly Sunny

    • 35
    • 56

    Mostly Cloudy

    • 23
    • 42

    Mostly Cloudy

Today 9 Jan St. Charles

Mostly cloudy and much cooler. Near steady temperature in the upper 40s. Northwest Winds 15 to 20 Mph with Gusts up to 30 Mph, becoming north 5 to 10 Mph this afternoon.

Tonight 9 Jan St. Charles

Mostly cloudy. A chance of rain after midnight. Cooler with Lows in the mid 30s. Northeast Winds around 5 Mph, becoming north after midnight. Chance of rain 50 percent.

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Lake St Louis Temperature Statistics

January Temperature

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

  • Lowest 4 January, 2026

    19 °F

  • Average January

    38.6 °F

  • Highest 6 January, 2026

    68 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    57.1 °F

  • Average High 2021–2026

    68.3 °F
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