West Alton Weather Forecast

    • 72
    • 92

    Chance Thunderstorms

    • 67
    • 86

    Partly Sunny

    • 72
    • 90

    Partly Sunny

    • 68
    • 88

    Mostly Cloudy

    • 65
    • 83

    Slight Chance Rain Showers

    • 66
    • 85

    Partly Sunny

Today 16 Aug St. Charles

Partly sunny. A chance of Showers and Thunderstorms, mainly this morning. Highs in the lower 90s. West Winds 5 to 10 Mph. Gusts up to 20 Mph this morning. Chance of rain 40 percent. Heat index Values up to 111 this afternoon.

Tonight 16 Aug St. Charles

Partly cloudy in the Evening, then becoming mostly cloudy. A chance of Showers and Thunderstorms. Humid with Lows in the lower 70s. North Winds 5 to 10 Mph. Chance of rain 50 percent. Heat index Values up to 107 early in the evening.

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West Alton Temperature Statistics

August Temperature

St. Louis Regional Airport (9.9 miles)

  • Lowest 3 August, 2026

    63.5 °F

  • Average August

    75.7 °F

  • Highest 11 August, 2026

    95 °F

Climate (2021–2026)

St. Louis Regional Airport (9.9 miles)

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  • Average Low 2021–2026

    46.6 °F

  • Average 2021–2026

    54.5 °F

  • Average High 2021–2026

    66.6 °F
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