Six Flags - St. Louis Weather Forecast

    • 54
    • 72

    Increasing Clouds

    • 57
    • 71

    Mostly Cloudy

    • 46
    • 71

    Partly Sunny

    • 53
    • 69

    Mostly Cloudy

    • 19
    • 60

    Slight Chance Rain/Snow

    • 17
    • 29

    Partly Sunny

    • 24
    • 36

    Mostly Cloudy

Today 24 Dec St. Louis

Mostly cloudy. Highs in the upper 60s. Southeast Winds 5 to 10 Mph.

Tonight 24 Dec St. Louis

Mostly cloudy. Patchy fog after midnight. Lows in the lower 50s. South Winds 5 to 10 Mph, becoming west after midnight.

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Six Flags - St. Louis Temperature Statistics

December Temperature

St. Louis, Spirit Of St. Louis Airport (9.9 miles)

  • Lowest 14 December, 2025

    7 °F

  • Average December

    33.7 °F

  • Highest 22 December, 2025

    59 °F

Climate (2020–Present)

St. Louis, Spirit Of St. Louis Airport (9.9 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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