Maple Island Conservation Area Weather Forecast

    • 69
    • 87

    Mostly Sunny

    • 65
    • 86

    Mostly Sunny

    • 63
    • 83

    Partly Sunny

    • 66
    • 82

    Partly Sunny

    • 68
    • 86

    Partly Sunny

    • 67
    • 88

    Partly Sunny

Today 21 Aug St. Charles

Sunny. Highs in the mid 80s. East Winds around 5 Mph, becoming west around 5 Mph this afternoon.

Tonight 21 Aug St. Charles

Mostly clear in the Evening, then becoming partly cloudy. Lows in the upper 60s. Southwest Winds around 5 Mph.

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  • Temperature Real-Time

Maple Island Conservation Area Temperature Statistics

August Temperature

St. Louis Regional Airport (6.2 miles)

  • Lowest 18 August, 2026

    63.3 °F

  • Average August

    76.2 °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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