Affton Weather Forecast

    • 78
    • 93

    Slight Chance Thunderstorms

    • 78
    • 98

    Hot

    • 77
    • 98

    Hot

    • 77
    • 93

    Slight Chance Thunderstorms

    • 76
    • 95

    Chance Thunderstorms

    • 76
    • 96

    Slight Chance Thunderstorms

Today 22 Jul St. Louis

Sunny late this Morning, then becoming partly sunny. Isolated Showers and Thunderstorms this afternoon. Highs in the lower 90s. Southeast Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 108 this afternoon.

Tonight 22 Jul St. Louis

Partly cloudy. Isolated Showers and Thunderstorms in the evening. Humid with Lows in the mid 70s. Southeast Winds around 5 Mph. Chance of rain 20 percent. Heat index Values up to 106 early in the evening.

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Affton Temperature Statistics

July Temperature

St. Louis Downtown Airport (9.9 miles)

  • Lowest 2 July, 2025

    63.6 °F

  • Average July

    81.6 °F

  • Highest 11 July, 2025

    97.6 °F

Climate (2020–Present)

St. Louis Downtown Airport (9.9 miles)

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  • Average Low 2020–2025

    47.3 °F

  • Average 2020–2025

    57.7 °F

  • Average High 2020–2025

    68.3 °F
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