Saint Charles Weather Forecast

    • 36
    • 65

    Increasing Clouds

    • 18
    • 39

    Partly Sunny

    • 29
    • 34

    Partly Sunny

    • 22
    • 44

    Mostly Cloudy

    • 10
    • 31

    Partly Sunny

    • 14
    • 26

    Mostly Sunny

Today 13 Jan St. Charles

Mostly sunny. Highs in the lower 60s. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 13 Jan St. Charles

Mostly cloudy with a 50 percent chance of rain. Lows in the mid 30s. West Winds 10 to 15 Mph.

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Saint Charles Temperature Statistics

January Temperature

St. Louis Lambert International Airport (6.2 miles)

  • Lowest 4 January, 2026

    23 °F

  • Average January

    42.8 °F

  • Highest 6 January, 2026

    66.9 °F

Climate (2021–Present)

St. Louis Lambert International Airport (6.2 miles)

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  • Average Low 2021–2026

    50.5 °F

  • Average 2021–2026

    59.9 °F

  • Average High 2021–2026

    69.3 °F
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