West Alton Weather Forecast

    • 55
    • 81

    Rain Showers Likely

    • 46
    • 69

    Becoming Sunny

    • 50
    • 74

    Mostly Sunny

    • 57
    • 82

    Chance Rain Showers

    • 50
    • 76

    Sunny

    • 56
    • 76

    Slight Chance Thunderstorms

    • 63
    • 86

    Slight Chance Thunderstorms

Today 9 May St. Charles

Sunny. Highs around 80. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 9 May St. Charles

Showers likely with a slight chance of Thunderstorms. Lows in the mid 50s. Southwest Winds 5 to 10 Mph, becoming north after midnight. Chance of rain 70 percent.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

West Alton Temperature Statistics

May Temperature

St. Louis Regional Airport (9.9 miles)

  • Lowest 7 May, 2026

    39.6 °F

  • Average May

    55.7 °F

  • Highest 4 May, 2026

    75.2 °F

Climate (2021–Present)

St. Louis Regional Airport (9.9 miles)

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  • Average Low 2021–2026

    46.5 °F

  • Average 2021–2026

    54.4 °F

  • Average High 2021–2026

    66.7 °F
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