Byrnes Mill Weather Forecast

    • 50
    • 77

    Sunny

    • 55
    • 80

    Sunny

    • 56
    • 86

    Sunny

    • 56
    • 84

    Mostly Sunny

    • 57
    • 84

    Mostly Sunny

    • 59
    • 84

    Partly Sunny

Today 5 Oct Jefferson

Sunny. Highs in the upper 70s. Northeast Winds around 5 Mph.

Tonight 5 Oct Jefferson

Clear. Lows in the upper 40s. Northeast Winds around 5 Mph in the Evening, becoming light and variable.

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Byrnes Mill Temperature Statistics

October Temperature

St. Louis, Spirit Of St. Louis Airport (15.5 miles)

  • Lowest 2 October, 2026

    52 °F

  • Average October

    71.8 °F

  • Highest 1 October, 2026

    88 °F

Climate (2021–2026)

St. Louis, Spirit Of St. Louis Airport (15.5 miles)

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  • Average Low 2021–2026

    46.2 °F

  • Average 2021–2026

    57.6 °F

  • Average High 2021–2026

    69 °F
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