Arnold Weather Forecast

    • 52
    • 80

    Mostly Cloudy

    • 50
    • 78

    Mostly Cloudy

    • 52
    • 76

    Mostly Cloudy

    • 54
    • 81

    Mostly Sunny

    • 55
    • 83

    Partly Sunny

    • 57
    • 81

    Mostly Cloudy

Today 25 Oct Jefferson

Mostly sunny. Highs around 80. Light and variable Winds.

Tonight 25 Oct Jefferson

Mostly cloudy. Lows in the lower 50s. South Winds around 5 Mph in the Evening, becoming light and variable.

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Arnold Temperature Statistics

October Temperature

St. Louis Downtown Airport (14.9 miles)

  • Lowest 18 October, 2026

    35.7 °F

  • Average October

    64.6 °F

  • Highest 13 October, 2026

    94.6 °F

Climate (2021–2026)

St. Louis Downtown Airport (14.9 miles)

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  • Average Low 2021–2026

    47.8 °F

  • Average 2021–2026

    58.7 °F

  • Average High 2021–2026

    69.5 °F
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