St. Charles Airport Weather Forecast

    • 53
    • 86

    Sunny

    • 61
    • 90

    Mostly Sunny

    • 59
    • 85

    Mostly Cloudy

    • 60
    • 82

    Mostly Sunny

    • 66
    • 93

    Mostly Sunny

    • 60
    • 86

    Slight Chance Rain Showers

    • 61
    • 82

    Chance Rain Showers

Today 8 Oct St. Charles

Mostly sunny with a slight chance of Thunderstorms. A chance of Showers. Highs in the lower 80s. Chance of rain 50 percent.

Tonight 8 Oct St. Charles

Clear. Lows in the lower 50s. Southeast Winds around 5 Mph.

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St. Charles Airport Temperature Statistics

October Temperature

St. Charles, St. Charles County Smartt Airport (6.2 miles)

  • Lowest 4 October, 2026

    44.1 °F

  • Average October

    65.6 °F

  • Highest 1 October, 2026

    91.7 °F

Climate (2021–2026)

St. Charles, St. Charles County Smartt Airport (6.2 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    69 °F
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