Chesterfield Weather Forecast

    • 65
    • 90

    Mostly Sunny

    • 74
    • 96

    Partly Sunny

    • 69
    • 98

    Rain Showers

    • 63
    • 85

    Partly Sunny

    • 65
    • 87

    Chance Rain Showers

    • 68
    • 91

    Chance Rain Showers

Today 7 Sep St. Louis

Sunny. Highs in the upper 80s. East Winds 5 to 10 Mph.

Tonight 7 Sep St. Louis

Mostly clear. Lows in the mid 60s. East Winds 5 to 10 Mph.

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Chesterfield Temperature Statistics

September Temperature

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

  • Lowest 1 September, 2026

    71.7 °F

  • Average September

    86.4 °F

  • Highest 1 September, 2026

    99.6 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    46.1 °F

  • Average 2021–2026

    57.5 °F

  • Average High 2021–2026

    68.9 °F
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