Maple Island Conservation Area Weather Forecast

    • 63
    • 83

    Decreasing Clouds

    • 63
    • 82

    Partly Sunny

    • 65
    • 80

    Chance Thunderstorms

    • 71
    • 89

    Mostly Sunny

    • 78
    • 96

    Mostly Sunny

    • 75
    • 99

    Slight Chance Thunderstorms

Today 22 Jul St. Charles

Mostly sunny. Highs in the lower 80s. North Winds 5 to 10 Mph.

Tonight 22 Jul St. Charles

Mostly cloudy in the Evening, then clearing. Lows in the lower 60s. Northeast Winds 5 to 10 Mph.

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Maple Island Conservation Area Temperature Statistics

July Temperature

St. Louis Regional Airport (6.2 miles)

  • Lowest 14 July, 2026

    66.4 °F

  • Average July

    77.5 °F

  • Highest 2 July, 2026

    93.2 °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

    66.7 °F
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