Arnold Weather Forecast

    • 36
    • 67

    Mostly Sunny

    • 43
    • 70

    Mostly Cloudy

    • 42
    • 61

    Rain Likely

    • 41
    • 56

    Rain

    • 40
    • 56

    Rain Likely

    • 38
    • 60

    Slight Chance Rain

Today 17 Apr Northwestern Mendocino Interior

Sunny. Areas of frost in the morning. Highs 61 to 74.

Tonight 17 Apr Northwestern Mendocino Interior

Partly cloudy. Patchy frost overnight. Lows 36 to 46.

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Arnold Temperature Statistics

April Temperature

Ukiah Municipal Airport (28.6 miles)

  • Lowest 3 April, 2026

    36.6 °F

  • Average April

    57.9 °F

  • Highest 5 April, 2026

    84.7 °F

Climate (2021–Present)

Ukiah Municipal Airport (28.6 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    61 °F

  • Average High 2021–2026

    76.3 °F
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