Lake St Louis Weather Forecast

    • 27
    • 44

    Becoming Sunny

    • 45
    • 58

    Increasing Clouds

    • 35
    • 62

    Mostly Sunny

    • 45
    • 62

    Partly Sunny

    • 42
    • 58

    Rain Likely

    • 32
    • 53

    Chance Rain

    • 24
    • 45

    Partly Sunny

Today 4 Jan St. Charles

Mostly sunny Early, then becoming mostly cloudy. Highs in the mid 40s. Southeast Winds 5 to 10 Mph.

Tonight 4 Jan St. Charles

Mostly clear. Lows in the lower 30s. South Winds 5 to 10 Mph with Gusts up to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake St Louis Temperature Statistics

January Temperature

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

  • Lowest 1 January, 2026

    21 °F

  • Average January

    31.7 °F

  • Highest 1 January, 2026

    36 °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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