Ballwin Weather Forecast

    • 77
    • 95

    Becoming Sunny

    • 79
    • 98

    Hot

    • 78
    • 97

    Hot

    • 74
    • 93

    Thunderstorms Likely

    • 71
    • 86

    Thunderstorms Likely

    • 70
    • 85

    Chance Thunderstorms

Today 9 Aug St. Louis

Sunny with Highs in the mid 90s. South Winds 10 to 15 Mph. Heat index Values up to 104.

Tonight 9 Aug St. Louis

Mostly clear. Near steady temperature in the mid 70s. South Winds around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Ballwin Temperature Statistics

August Temperature

St. Louis, Spirit Of St. Louis Airport (6.8 miles)

  • Lowest 3 August, 2026

    62.7 °F

  • Average August

    74.7 °F

  • Highest 4 August, 2026

    89.7 °F

Climate (2021–2026)

St. Louis, Spirit Of St. Louis Airport (6.8 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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