O'Fallon Weather Forecast

    • 43
    • 78

    Mostly Sunny

    • 34
    • 58

    Becoming Sunny

    • 48
    • 59

    Rain Showers Likely

    • 47
    • 71

    Mostly Cloudy

    • 51
    • 63

    Rain

    • 52
    • 63

    Rain

    • 42
    • 61

    Chance Rain

Today 15 Nov St. Charles

Sunny. Highs in the upper 70s. West Winds 10 to 15 Mph with Gusts up to 25 Mph.

Tonight 15 Nov St. Charles

Mostly clear. Much cooler with Lows in the lower 40s. North Winds 5 to 10 Mph with Gusts up to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

O'Fallon Temperature Statistics

November Temperature

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

  • Lowest 10 November, 2025

    21 °F

  • Average November

    49.3 °F

  • Highest 4 November, 2025

    75 °F

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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