Ballwin Weather Forecast

    • 76
    • 96

    Chance Thunderstorms

    • 76
    • 93

    Slight Chance Thunderstorms

    • 76
    • 97

    Hot

    • 78
    • 99

    Hot

    • 77
    • 99

    Hot

    • 77
    • 98

    Hot

Today 20 Jul St. Louis

Mostly sunny. Humid with Highs in the mid 90s. Southwest Winds 5 to 10 Mph. Heat index Values up to 109.

Tonight 20 Jul St. Louis

Partly cloudy. Near steady temperature in the upper 70s. Southwest Winds around 5 Mph.

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Ballwin Temperature Statistics

July Temperature

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

  • Lowest 2 July, 2025

    62.7 °F

  • Average July

    80 °F

  • Highest 16 July, 2025

    95.6 °F

Climate (2020–Present)

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

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  • Average Low 2020–2025

    45.8 °F

  • Average 2020–2025

    56.8 °F

  • Average High 2020–2025

    68 °F
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