Ballwin Weather Forecast

    • 27
    • 55

    Decreasing Clouds

    • 31
    • 44

    Increasing Clouds

    • 47
    • 54

    Partly Sunny

    • 45
    • 63

    Partly Sunny

    • 57
    • 69

    Mostly Cloudy

    • 53
    • 75

    Partly Sunny

    • 45
    • 67

    Mostly Cloudy

Today 20 Dec St. Louis

Mostly sunny. Not as cool with Highs in the mid 50s. Temperature falling into the upper 40s late. Northwest Winds 5 to 10 Mph with Gusts up to 20 Mph.

Tonight 20 Dec St. Louis

Partly cloudy. Lows in the upper 20s. North Winds 5 to 10 Mph.

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Ballwin Temperature Statistics

December Temperature

St. Louis, Spirit Of St. Louis Airport (6.8 miles)

  • Lowest 14 December, 2025

    7 °F

  • Average December

    32.5 °F

  • Highest 18 December, 2025

    57.9 °F

Climate (2020–Present)

St. Louis, Spirit Of St. Louis Airport (6.8 miles)

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  • Average Low 2020–2025

    45.9 °F

  • Average 2020–2025

    57 °F

  • Average High 2020–2025

    68.2 °F
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