Maple Island Conservation Area Weather Forecast

    • 71
    • 100

    Hot

    • 63
    • 91

    Mostly Sunny

    • 66
    • 90

    Mostly Sunny

    • 75
    • 98

    Hot

    • 71
    • 101

    Chance Rain Showers

    • 66
    • 91

    Slight Chance Rain Showers

Today 5 Sep St. Charles

Sunny, hot with Highs around 100. Northwest Winds 5 to 10 Mph. Heat index Values up to 110.

Tonight 5 Sep St. Charles

Partly cloudy in the Evening, then clearing. Humid with Lows in the lower 70s. Northeast Winds around 5 Mph. Heat index Values up to 106 early in the evening.

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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 1 September, 2026

    70.2 °F

  • Average September

    81.9 °F

  • Highest 1 September, 2026

    98.6 °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

    66.6 °F
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