Maple Island Conservation Area Weather Forecast

    • 56
    • 75

    Gradual Clearing

    • 56
    • 79

    Mostly Sunny

    • 66
    • 84

    Mostly Cloudy

    • 69
    • 82

    Rain Showers Likely

    • 64
    • 79

    Rain Showers Likely

    • 61
    • 75

    Chance Rain Showers

Today 27 Sep St. Charles

Mostly cloudy with a slight chance of Showers in the Morning, then partly sunny in the afternoon. Highs in the mid 70s. Northeast Winds around 5 Mph. Chance of rain 20 percent.

Tonight 27 Sep St. Charles

Partly cloudy in the Evening, then clearing. Lows in the mid 50s. Northeast Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Maple Island Conservation Area Temperature Statistics

September Temperature

St. Louis Regional Airport (6.2 miles)

  • Lowest 23 September, 2026

    55.4 °F

  • Average September

    75.4 °F

  • Highest 5 September, 2026

    100.4 °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

    54.6 °F

  • Average High 2021–2026

    66.7 °F
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