Maple Island Conservation Area Weather Forecast

    • 63
    • 86

    Mostly Sunny

    • 62
    • 87

    Mostly Sunny

    • 68
    • 90

    Partly Sunny

    • 75
    • 96

    Mostly Sunny

    • 77
    • 98

    Hot

    • 78
    • 98

    Hot

Today 27 Aug St. Charles

Sunny. Highs in the mid 80s. North Winds 5 to 10 Mph.

Tonight 27 Aug St. Charles

Mostly clear. Lows in the lower 60s. North Winds 5 to 10 Mph in the Evening, becoming light and variable.

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Maple Island Conservation Area Temperature Statistics

August Temperature

St. Louis Regional Airport (6.2 miles)

  • Lowest 24 August, 2026

    54.5 °F

  • Average August

    74.7 °F

  • Highest 11 August, 2026

    95 °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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