Chesterfield Weather Forecast

    • 72
    • 93

    Thunderstorms Likely

    • 67
    • 86

    Partly Sunny

    • 72
    • 90

    Chance Rain Showers

    • 68
    • 88

    Rain Showers Likely

    • 65
    • 83

    Slight Chance Thunderstorms

    • 66
    • 85

    Slight Chance Thunderstorms

    • 66
    • 87

    Mostly Sunny

Today 16 Aug St. Louis

Mostly sunny. Highs in the lower 90s. West Winds around 5 Mph. Heat index Values up to 110.

Tonight 16 Aug St. Louis

Mostly cloudy. Showers and Thunderstorms Likely, mainly this evening. Lows in the lower 70s. North Winds around 5 Mph. Gusts up to 20 Mph this evening. Chance of rain 70 percent. Heat index Values up to 106 early this evening.

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Chesterfield Temperature Statistics

August Temperature

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

  • Lowest 3 August, 2026

    62.7 °F

  • Average August

    79.5 °F

  • Highest 11 August, 2026

    95.6 °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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