O'Fallon Weather Forecast

    • 31
    • 51

    Decreasing Clouds

    • 37
    • 55

    Mostly Sunny

    • 41
    • 65

    Mostly Sunny

    • 50
    • 69

    Partly Sunny

    • 42
    • 69

    Mostly Sunny

    • 54
    • 67

    Slight Chance Thunderstorms

    • 48
    • 70

    Partly Sunny

Today 1 Nov St. Charles

Mostly cloudy with a 20 percent chance of rain. Cooler. Near steady temperature in the lower 50s. West Winds 5 to 10 Mph.

Tonight 1 Nov St. Charles

Mostly cloudy with a slight chance of rain this Evening, then mostly clear after midnight. Widespread frost after midnight. Lows in the lower 30s. Northwest Winds around 5 Mph. Chance of rain 20 percent.

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O'Fallon Temperature Statistics

November Temperature

St. Louis, Spirit Of St. Louis Airport (10.6 miles)

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Climate (2020–Present)

St. Louis, Spirit Of St. Louis Airport (10.6 miles)

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  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    57.1 °F

  • Average High 2020–2025

    68.3 °F
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