O'Fallon Weather Forecast

    • 26
    • 45

    Mostly Sunny

    • 26
    • 48

    Mostly Sunny

    • 29
    • 51

    Partly Sunny

    • 29
    • 52

    Mostly Sunny

    • 31
    • 55

    Mostly Sunny

Today 13 Nov St. Charles

Mostly sunny. Highs in the mid 40s. North Winds 10 to 15 Mph.

Tonight 13 Nov St. Charles

Mostly clear. Lows in the mid 20s. North Winds 5 to 10 Mph.

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O'Fallon Temperature Statistics

November Temperature

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

  • Lowest 8 November, 2026

    29.6 °F

  • Average November

    55.1 °F

  • Highest 9 November, 2026

    73.7 °F

Climate (2021–2026)

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

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  • Average Low 2021–2026

    46.2 °F

  • Average 2021–2026

    57.7 °F

  • Average High 2021–2026

    69.1 °F
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