Maple Island Conservation Area Weather Forecast

    • 63
    • 86

    Partly Sunny

    • 73
    • 87

    Isolated Thunderstorms

    • 72
    • 99

    Chance Thunderstorms

    • 74
    • 95

    Slight Chance Thunderstorms

    • 71
    • 95

    Chance Thunderstorms

    • 65
    • 91

    Chance Rain Showers

Today 13 Sep St. Charles

Mostly sunny. Near steady temperature in the mid 80s. North Winds 5 to 10 Mph.

Tonight 13 Sep St. Charles

Partly cloudy. Lows in the mid 60s. Northeast Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Maple Island Conservation Area Temperature Statistics

September Temperature

St. Louis Regional Airport (6.2 miles)

  • Lowest 8 September, 2026

    59 °F

  • Average September

    78.7 °F

  • Highest 5 September, 2026

    100.4 °F

Climate (2021–2026)

St. Louis Regional Airport (6.2 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    46.6 °F

  • Average 2021–2026

    54.5 °F

  • Average High 2021–2026

    66.7 °F
Get WillyWeather+ to remove ads