St Charles Weather Forecast

    • 23
    • 36

    Mostly Cloudy

    • 5
    • 27

    Chance Snow

    • 9
    • 15

    Mostly Sunny

    • 27
    • 39

    Mostly Sunny

    • 38
    • 50

    Partly Sunny

    • 46
    • 57

    Chance Rain

Today 12 Dec St. Charles

Cloudy. Highs in the upper 30s. North Winds 5 to 10 Mph.

Tonight 12 Dec St. Charles

Mostly cloudy. Lows in the lower 20s. Northwest Winds 5 to 10 Mph.

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St Charles Temperature Statistics

December Temperature

St. Louis Lambert International Airport (7.5 miles)

  • Lowest 4 December, 2025

    14 °F

  • Average December

    31.6 °F

  • Highest 9 December, 2025

    55.9 °F

Climate (2020–Present)

St. Louis Lambert International Airport (7.5 miles)

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  • Average Low 2020–2025

    50.5 °F

  • Average 2020–2025

    59.8 °F

  • Average High 2020–2025

    69.1 °F
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