Upper Mississippi Waterfowl Area Weather Forecast

    • 71
    • 97

    Hot

    • 70
    • 99

    Slight Chance Thunderstorms

    • 68
    • 95

    Slight Chance Thunderstorms

    • 68
    • 95

    Partly Sunny

    • 66
    • 94

    Partly Sunny

    • 65
    • 90

    Chance Rain Showers

Today 13 Sep St. Charles

Mostly sunny. Hot. Near steady temperature in the mid 90s. Southwest Winds around 5 Mph.

Tonight 13 Sep St. Charles

Mostly clear. Lows in the lower 70s. South Winds around 5 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Upper Mississippi Waterfowl Area Temperature Statistics

September Temperature

St. Louis Regional Airport (9.3 miles)

  • Lowest 8 September, 2025

    43.5 °F

  • Average September

    61.8 °F

  • Highest 11 September, 2025

    87.8 °F

Climate (2020–Present)

St. Louis Regional Airport (9.3 miles)

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

  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    53.8 °F

  • Average High 2020–2025

    66 °F
Get WillyWeather+ to remove ads