Maple Island Conservation Area Weather Forecast

    • 71
    • 81

    Thunderstorms Likely

    • 72
    • 89

    Chance Thunderstorms

    • 73
    • 91

    Mostly Sunny

    • 76
    • 93

    Mostly Sunny

    • 76
    • 95

    Slight Chance Thunderstorms

    • 74
    • 94

    Partly Sunny

Today 6 Aug St. Charles

Mostly cloudy. Showers and Thunderstorms, mainly in the morning. Some Thunderstorms may produce heavy rainfall in the morning. Highs in the mid 80s. Southwest Winds around 5 Mph. Chance of rain 80 percent.

Tonight 6 Aug St. Charles

Numerous Showers and Thunderstorms. Some Thunderstorms may produce heavy rainfall. Near steady temperature in the lower 70s. South Winds around 5 Mph. Chance of rain 70 percent.

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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

    70.8 °F

  • Highest 3 August, 2026

    84.2 °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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