Six Flags - St. Louis Weather Forecast

    • 73
    • 91

    Chance Thunderstorms

    • 71
    • 94

    Chance Thunderstorms

    • 68
    • 86

    Thunderstorms Likely

    • 67
    • 85

    Chance Thunderstorms

    • 67
    • 85

    Chance Thunderstorms

    • 68
    • 86

    Chance Thunderstorms

Today 9 Aug St. Louis

Hot and humid. Mostly cloudy with Showers and Thunderstorms in the Morning, then partly cloudy with slight chance of Showers and Thunderstorms in the afternoon. Storms may produce heavy rainfall in the morning. High around 90. Highest heat index Readings of around 100 in the afternoon. South wind around 10 Mph. Chance of rain 80 percent.

Tonight 9 Aug St. Louis

Partly cloudy. A 30 percent chance of Showers and Thunderstorms after midnight. Low in the mid 70s. Highest heat index Readings of around 100 early in the evening. South wind around 10 Mph.

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Six Flags - St. Louis Temperature Statistics

August Temperature

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

  • Lowest 5 August, 2020

    55 °F
  • Average August

    69.7 °F
  • Highest 2 August, 2020

    84 °F

Climate (2010–Present)

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

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  • Average Low 2010–Present

    47.9 °F
  • Average 2010–Present

    57.7 °F
  • Average High 2010–Present

    67.8 °F
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