South Shore Weather Forecast

    • 28
    • 44

    Partly Sunny

    • 44
    • 56

    Increasing Clouds

    • 47
    • 64

    Partly Sunny

    • 58
    • 72

    Mostly Cloudy

    • 54
    • 76

    Partly Sunny

    • 45
    • 66

    Partly Sunny

    • 31
    • 62

    Mostly Cloudy

Today 21 Dec St. Charles

Sunny, cooler with Highs in the mid 40s. Southeast Winds around 5 Mph.

Tonight 21 Dec St. Charles

Partly cloudy this Evening, then becoming mostly clear. Lows in the upper 20s. Southeast Winds around 5 Mph.

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South Shore Temperature Statistics

December Temperature

St. Charles, St. Charles County Smartt Airport (6.2 miles)

  • Lowest 14 December, 2025

    6.1 °F

  • Average December

    30.4 °F

  • Highest 18 December, 2025

    57.9 °F

Climate (2020–Present)

St. Charles, St. Charles County Smartt Airport (6.2 miles)

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  • Average Low 2020–2025

    47.4 °F

  • Average 2020–2025

    57.7 °F

  • Average High 2020–2025

    68.4 °F
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