Maple Island Conservation Area Weather Forecast

    • 62
    • 73

    Mostly Cloudy

    • 61
    • 81

    Mostly Cloudy

    • 58
    • 74

    Slight Chance Rain Showers

    • 58
    • 79

    Partly Sunny

    • 61
    • 83

    Partly Sunny

    • 65
    • 86

    Rain Showers Likely

Today 24 Sep St. Charles

Mostly cloudy. Highs in the lower 70s. Northeast Winds around 5 Mph.

Tonight 24 Sep St. Charles

Mostly cloudy. Lows in the lower 60s. Northeast Winds around 5 Mph in the Evening, becoming light and variable.

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  • Temperature Real-Time

Maple Island Conservation Area Temperature Statistics

September Temperature

St. Louis Regional Airport (6.2 miles)

  • Lowest 8 September, 2026

    59 °F

  • Average September

    77.1 °F

  • Highest 5 September, 2026

    100.4 °F

Climate (2021–2026)

St. Louis Regional Airport (6.2 miles)

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  • Average Low 2021–2026

    46.6 °F

  • Average 2021–2026

    54.6 °F

  • Average High 2021–2026

    66.7 °F
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