Maple Island Conservation Area Weather Forecast

    • 60
    • 77

    Slight Chance Rain Showers

    • 66
    • 84

    Partly Sunny

    • 67
    • 86

    Rain Showers Likely

    • 66
    • 84

    Rain Showers

    • 60
    • 79

    Partly Sunny

    • 62
    • 80

    Partly Sunny

Today 18 Jun St. Charles

Mostly cloudy with a chance of Showers with isolated Thunderstorms. Cooler. Near steady temperature in the mid 70s. Northwest Winds 5 to 10 Mph. Chance of rain 40 percent.

Tonight 18 Jun St. Charles

Mostly cloudy with a slight chance of Showers with isolated Thunderstorms in the Evening, then partly cloudy after midnight. Cooler with Lows in the upper 50s. Northwest Winds 5 to 10 Mph in the Evening, becoming light and variable. Chance of rain 20 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Maple Island Conservation Area Temperature Statistics

June Temperature

St. Louis Regional Airport (6.2 miles)

  • Lowest 3 June, 2026

    52.5 °F

  • Average June

    72.6 °F

  • Highest 9 June, 2026

    91.4 °F

Climate (2021–2026)

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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