Maple Island Conservation Area Weather Forecast

    • 77
    • 97

    Isolated Thunderstorms

    • 77
    • 98

    Chance Thunderstorms

    • 74
    • 95

    Chance Thunderstorms

    • 75
    • 92

    Partly Sunny

    • 77
    • 97

    Hot

    • 73
    • 96

    Chance Thunderstorms

Today 11 Aug St. Charles

Sunny, hot with Highs in the upper 90s. Southwest Winds 5 to 10 Mph with Gusts up to 20 Mph. Heat index Values up to 109.

Tonight 11 Aug St. Charles

Partly cloudy in the Evening, then clearing. Lows in the upper 70s. Southwest Winds 5 to 10 Mph. Heat index Values up to 107 early in the evening.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Maple Island Conservation Area Temperature Statistics

August Temperature

St. Louis Regional Airport (6.2 miles)

  • Lowest 3 August, 2026

    63.5 °F

  • Average August

    73.2 °F

  • Highest 7 August, 2026

    89.6 °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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