Chesterfield Weather Forecast

    • 52
    • 75

    Chance Rain Showers

    • 50
    • 78

    Mostly Sunny

    • 50
    • 77

    Sunny

    • 55
    • 80

    Mostly Sunny

    • 60
    • 84

    Mostly Sunny

    • 63
    • 90

    Mostly Sunny

Today 5 Sep St. Louis

Mostly sunny this Morning, then mostly cloudy with a chance of Showers this afternoon. Highs in the mid 70s. Temperature falling into the lower 70s this afternoon. Northwest Winds 5 to 10 Mph. Chance of rain 50 percent.

Tonight 5 Sep St. Louis

Mostly cloudy with a 50 percent chance of Showers. Lows in the lower 50s. West Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Chesterfield Temperature Statistics

September Temperature

St. Louis, Spirit Of St. Louis Airport (3.7 miles)

  • Lowest 1 September, 2025

    57 °F

  • Average September

    68.8 °F

  • Highest 1 September, 2025

    81 °F

Climate (2020–Present)

St. Louis, Spirit Of St. Louis Airport (3.7 miles)

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

  • Average Low 2020–2025

    45.8 °F

  • Average 2020–2025

    56.9 °F

  • Average High 2020–2025

    68.1 °F
Get WillyWeather+ to remove ads