Lake St Louis Weather Forecast

    • 36
    • 54

    Mostly Sunny

    • 37
    • 59

    Slight Chance Rain Showers

    • 17
    • 42

    Mostly Cloudy

    • 27
    • 33

    Partly Sunny

    • 20
    • 42

    Mostly Cloudy

    • 11
    • 29

    Mostly Cloudy

Today 12 Jan St. Charles

Sunny. Not as cool with Highs in the mid 50s. Southwest Winds 5 to 10 Mph.

Tonight 12 Jan St. Charles

Mostly clear. Not as cool with Lows in the mid 30s. Southwest Winds 5 to 10 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 4 January, 2026

    19 °F

  • Average January

    43.4 °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

    57.2 °F

  • Average High 2021–2026

    68.4 °F
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