Maple Island Conservation Area Weather Forecast

    • 74
    • 95

    Decreasing Clouds

    • 70
    • 97

    Rain Showers

    • 64
    • 82

    Rain Showers

    • 68
    • 87

    Partly Sunny

    • 68
    • 90

    Chance Rain Showers

    • 68
    • 89

    Slight Chance Rain Showers

Today 8 Sep St. Charles

Mostly sunny. Highs in the mid 90s. Southeast Winds 5 to 10 Mph.

Tonight 8 Sep St. Charles

Mostly clear. Not as cool with Lows in the mid 70s. South Winds 5 to 10 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 6 September, 2026

    69.8 °F

  • Average September

    81.3 °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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