Six Flags - St. Louis Weather Forecast

    • 61
    • 93

    Thunderstorms

    • 62
    • 83

    Mostly Sunny

    • 66
    • 82

    Rain Showers

    • 56
    • 77

    Slight Chance Rain Showers

    • 56
    • 77

    Partly Sunny

    • 59
    • 80

    Slight Chance Thunderstorms

Today 11 Jun St. Louis

Sunny. Highs in the mid 90s. Southwest Winds 15 to 20 Mph with Gusts up to 30 Mph. Heat index Values up to 106.

Tonight 11 Jun St. Louis

Mostly cloudy. Showers and Thunderstorms, mainly in the evening. Lows in the mid 60s. West Winds 15 to 20 Mph with Gusts up to 30 Mph, becoming northwest 5 to 10 Mph after midnight. Chance of rain 90 percent. Heat index Values up to 101 early in the evening.

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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

    75.6 °F

  • Highest 9 June, 2026

    91.9 °F

Climate (2021–Present)

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

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  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    57.4 °F

  • Average High 2021–2026

    68.9 °F
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