Six Flags - St. Louis Weather Forecast

    • 71
    • 84

    Chance Thunderstorms

    • 73
    • 92

    Mostly Sunny

    • 75
    • 94

    Mostly Sunny

    • 75
    • 95

    Sunny

    • 75
    • 95

    Mostly Sunny

    • 75
    • 94

    Mostly Sunny

Today 27 Jun St. Louis

Patchy fog in the morning. Mostly cloudy with a chance of Showers. A slight chance of Thunderstorms in the Morning, then a chance of Thunderstorms in the afternoon. Highs in the mid 80s. Southwest Winds around 5 Mph. Chance of rain 40 percent.

Tonight 27 Jun St. Louis

Mostly cloudy with a slight chance of Showers and Thunderstorms. Patchy fog. Near steady temperature in the lower 70s. Light and variable Winds. Chance of rain 20 percent.

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Six Flags - St. Louis Temperature Statistics

June Temperature

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

  • Lowest 3 June, 2026

    52.6 °F

  • Average June

    74 °F

  • Highest 9 June, 2026

    93.7 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    46 °F

  • Average 2021–2026

    57.4 °F

  • Average High 2021–2026

    68.8 °F
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