Maple Island Conservation Area Weather Forecast

    • 57
    • 70

    Increasing Clouds

    • 58
    • 71

    Rain Showers Likely

    • 61
    • 81

    Chance Thunderstorms

    • 62
    • 82

    Rain Showers Likely

    • 64
    • 83

    Chance Rain Showers

    • 66
    • 85

    Chance Thunderstorms

Today 21 May St. Charles

Mostly sunny this Morning, then becoming mostly cloudy. Highs around 70. Northeast Winds 5 to 10 Mph.

Tonight 21 May St. Charles

Cloudy. Lows in the upper 50s. Northeast Winds 5 to 10 Mph.

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  • Temperature Real-Time

Maple Island Conservation Area Temperature Statistics

May Temperature

St. Louis Regional Airport (6.2 miles)

  • Lowest 7 May, 2026

    39.6 °F

  • Average May

    60.9 °F

  • Highest 17 May, 2026

    86 °F

Climate (2021–Present)

St. Louis Regional Airport (6.2 miles)

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  • Average Low 2021–2026

    46.5 °F

  • Average 2021–2026

    54.5 °F

  • Average High 2021–2026

    66.7 °F
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