Six Flags - St. Louis Weather Forecast

    • 34
    • 55

    Becoming Sunny

    • 57
    • 63

    Rain

    • 48
    • 76

    Thunderstorms

    • 47
    • 61

    Rain Likely

    • 47
    • 61

    Rain

    • 40
    • 55

    Rain Likely

Today 31 Mar St. Louis

Cloudy late this Morning, then becoming partly sunny. Much cooler with Highs in the mid 50s. Northwest Winds 10 to 15 Mph.

Tonight 31 Mar St. Louis

Mostly clear. Lows in the mid 30s. North Winds 5 to 10 Mph, becoming northeast after midnight.

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Six Flags - St. Louis Temperature Statistics

March Temperature

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

  • Lowest 2 March, 2025

    18.8 °F

  • Average March

    51.5 °F

  • Highest 14 March, 2025

    84.7 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    45.7 °F

  • Average 2020–2025

    56.7 °F

  • Average High 2020–2025

    67.9 °F
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