Maple Island Conservation Area Weather Forecast

    • 77
    • 93

    Slight Chance Thunderstorms

    • 72
    • 94

    Slight Chance Thunderstorms

    • 68
    • 87

    Partly Sunny

    • 74
    • 90

    Partly Sunny

    • 68
    • 91

    Mostly Cloudy

    • 64
    • 83

    Slight Chance Rain Showers

Today 15 Aug St. Charles

Partly sunny. A slight chance of Showers and Thunderstorms this morning. Highs in the mid 90s. Northeast Winds around 5 Mph, becoming southwest this afternoon. Chance of rain 20 percent. Heat index Values up to 111 this afternoon.

Tonight 15 Aug St. Charles

Mostly clear in the Evening, then becoming partly cloudy. Humid with Lows in the upper 70s. Southwest Winds around 5 Mph. Heat index Values up to 110 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

    75.3 °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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