West Alton Weather Forecast

    • 31
    • 38

    Mostly Sunny

    • 27
    • 53

    Partly Sunny

    • 29
    • 43

    Partly Sunny

    • 40
    • 47

    Mostly Cloudy

    • 46
    • 60

    Mostly Cloudy

    • 56
    • 67

    Mostly Cloudy

Today 19 Dec St. Charles

Sunny. Much cooler with Highs in the upper 30s. West Winds 15 to 20 Mph with Gusts up to 30 Mph, becoming southwest 5 to 10 Mph this afternoon.

Tonight 19 Dec St. Charles

Mostly clear in the Evening, then becoming partly cloudy. Near steady temperature in the mid 30s. Temperature rising into the mid 30s after midnight. South Winds 10 to 15 Mph with Gusts up to 25 Mph.

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West Alton Temperature Statistics

December Temperature

St. Louis Regional Airport (9.9 miles)

  • Lowest 5 December, 2025

    4.5 °F

  • Average December

    27.5 °F

  • Highest 16 December, 2025

    53.6 °F

Climate (2020–Present)

St. Louis Regional Airport (9.9 miles)

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  • Average Low 2020–2025

    46.2 °F

  • Average 2020–2025

    54 °F

  • Average High 2020–2025

    66.1 °F
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