Maple Island Conservation Area Weather Forecast

    • 61
    • 90

    Mostly Sunny

    • 71
    • 96

    Partly Sunny

    • 70
    • 99

    Rain Showers

    • 63
    • 86

    Partly Sunny

    • 67
    • 88

    Chance Rain Showers

    • 68
    • 93

    Slight Chance Thunderstorms

Today 7 Sep St. Charles

Sunny. Highs in the upper 80s. East Winds 5 to 10 Mph.

Tonight 7 Sep St. Charles

Mostly clear. Lows in the mid 60s. East Winds around 5 Mph.

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  • Temperature Real-Time

Maple Island Conservation Area Temperature Statistics

September Temperature

St. Louis Regional Airport (6.2 miles)

  • Lowest 1 September, 2026

    70.2 °F

  • Average September

    81.7 °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

    54.5 °F

  • Average High 2021–2026

    66.7 °F
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