Maple Island Conservation Area Weather Forecast

    • 56
    • 81

    Thunderstorms Likely

    • 50
    • 70

    Slight Chance Rain Showers

    • 56
    • 73

    Mostly Cloudy

    • 59
    • 75

    Chance Thunderstorms

    • 61
    • 81

    Chance Rain Showers

    • 64
    • 84

    Chance Rain Showers

Today 19 May St. Charles

Mostly cloudy. A chance of Showers and Thunderstorms in the Morning, then Showers and Thunderstorms likely in the afternoon. Some Thunderstorms may produce heavy rainfall. Highs in the lower 80s. Southwest Winds 10 to 15 Mph with Gusts up to 25 Mph. Chance of rain 70 percent.

Tonight 19 May St. Charles

Showers likely. Thunderstorms Likely, mainly in the evening. Lows in the mid 50s. North Winds 5 to 10 Mph. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • 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

    59.1 °F

  • Highest 15 May, 2026

    82.4 °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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