Maple Island Conservation Area Weather Forecast

    • 73
    • 99

    Hot

    • 67
    • 94

    Rain Showers Likely

    • 61
    • 81

    Rain Showers Likely

    • 54
    • 73

    Mostly Cloudy

    • 56
    • 76

    Partly Sunny

    • 58
    • 78

    Partly Sunny

Today 19 Sep St. Charles

Partly sunny. Hot. Near steady temperature in the mid 90s. West Winds 5 to 10 Mph.

Tonight 19 Sep St. Charles

Partly cloudy. Lows in the lower 70s. Southwest Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • 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

    77.4 °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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