Chesterfield Weather Forecast

    • 78
    • 100

    Thunderstorms

    • 80
    • 97

    Hot

    • 72
    • 93

    Partly Sunny

    • 69
    • 89

    Mostly Sunny

    • 71
    • 90

    Chance Rain Showers

    • 70
    • 86

    Chance Thunderstorms

    • 69
    • 85

    Slight Chance Thunderstorms

Today 26 Jul St. Louis

Sunny with isolated Showers and Thunderstorms. Hot. Near steady temperature in the upper 90s. West Winds 5 to 10 Mph. Chance of rain 20 percent. Heat index Values up to 123.

Tonight 26 Jul St. Louis

Partly cloudy this Evening, then becoming mostly cloudy. Lows in the upper 70s. West Winds around 5 Mph, becoming southeast after midnight. Heat index Values up to 116 early this evening.

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Chesterfield Temperature Statistics

July Temperature

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

  • Lowest 23 July, 2026

    61.6 °F

  • Average July

    79.7 °F

  • Highest 2 July, 2026

    96.7 °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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