Maple Island Conservation Area Weather Forecast

    • 51
    • 82

    Sunny

    • 64
    • 84

    Increasing Clouds

    • 72
    • 90

    Mostly Cloudy

    • 64
    • 87

    Rain Showers Likely

    • 58
    • 73

    Chance Rain Showers

    • 58
    • 73

    Chance Rain Showers

    • 54
    • 72

    Partly Sunny

Today 28 Sep St. Charles

Mostly sunny. Highs in the upper 60s.

Tonight 28 Sep St. Charles

Clear. Lows in the lower 50s. Northeast Winds around 5 Mph this Evening, becoming light and variable.

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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 23 September, 2026

    55.4 °F

  • Average September

    74.4 °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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