Maple Island Conservation Area Weather Forecast

    • 77
    • 96

    Chance Thunderstorms

    • 77
    • 92

    Slight Chance Thunderstorms

    • 78
    • 98

    Hot

    • 78
    • 100

    Hot

    • 74
    • 98

    Hot

    • 69
    • 89

    Partly Sunny

Today 12 Aug St. Charles

Mostly sunny. A chance of Showers and Thunderstorms in the afternoon. Hot with Highs in the mid 90s. Southwest Winds 5 to 10 Mph. Chance of rain 50 percent. Heat index Values up to 111.

Tonight 12 Aug St. Charles

Partly cloudy. Near steady temperature in the upper 70s. Southwest Winds around 5 Mph.

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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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