Saint Charles Weather Forecast

    • 48
    • 81

    Rain Showers Likely

    • 39
    • 55

    Clearing Late

    • 39
    • 60

    Mostly Sunny

    • 42
    • 67

    Mostly Sunny

    • 46
    • 71

    Partly Sunny

    • 49
    • 76

    Mostly Sunny

    • 52
    • 79

    Mostly Sunny

Today 15 Oct St. Charles

Partly sunny with a chance of Showers and Thunderstorms. Near steady temperature in the upper 70s. Southwest Winds around 10 Mph with Gusts up to 20 Mph. Chance of rain 50 percent.

Tonight 15 Oct St. Charles

Partly cloudy this Evening, then becoming cloudy. Scattered Showers. Much cooler with Lows in the upper 40s. West Winds 15 to 20 Mph with Gusts up to 30 Mph. Chance of rain 50 percent.

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Saint Charles Temperature Statistics

October Temperature

St. Louis Lambert International Airport (6.2 miles)

  • Lowest 3 October, 2026

    50.6 °F

  • Average October

    70.8 °F

  • Highest 13 October, 2026

    93 °F

Climate (2021–2026)

St. Louis Lambert International Airport (6.2 miles)

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  • Average Low 2021–2026

    50.6 °F

  • Average 2021–2026

    60.2 °F

  • Average High 2021–2026

    69.8 °F
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