Arnold Weather Forecast

    • 41
    • 85

    Mostly Sunny

    • 40
    • 71

    Increasing Clouds

    • 38
    • 61

    Mostly Cloudy

    • 38
    • 66

    Mostly Cloudy

    • 40
    • 70

    Partly Sunny

    • 38
    • 66

    Partly Sunny

    • 37
    • 66

    Mostly Sunny

Today 17 Oct Northwestern Interior Mendocino

Partly cloudy. Slight chance of rain. Highs 59 to 71.

Tonight 17 Oct Northwestern Interior Mendocino

Mostly clear. Lows 42 to 52.

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Arnold Temperature Statistics

October Temperature

Ukiah Municipal Airport (28.6 miles)

  • Lowest 13 October, 2026

    38.6 °F

  • Average October

    69.9 °F

  • Highest 5 October, 2026

    102.7 °F

Climate (2021–2026)

Ukiah Municipal Airport (28.6 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    61 °F

  • Average High 2021–2026

    76.1 °F
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