Arnold Weather Forecast

    • 48
    • 86

    Sunny

    • 46
    • 86

    Sunny

    • 47
    • 85

    Mostly Sunny

    • 46
    • 81

    Partly Sunny

    • 42
    • 74

    Mostly Cloudy

    • 40
    • 69

    Partly Sunny

Today 17 Mar Northwestern Mendocino Interior

Sunny. Highs 78 to 91.

Tonight 17 Mar Northwestern Mendocino Interior

Clear. Lows 48 to 58.

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Arnold Temperature Statistics

March Temperature

Ukiah Municipal Airport (28.6 miles)

  • Lowest 6 March, 2026

    37 °F

  • Average March

    56.2 °F

  • Highest 15 March, 2026

    84 °F

Climate (2021–Present)

Ukiah Municipal Airport (28.6 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    60.9 °F

  • Average High 2021–2026

    76.2 °F
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