Arnold Weather Forecast

    • 40
    • 48

    Rain

    • 44
    • 51

    Rain

    • 47
    • 58

    Rain

    • 42
    • 54

    Rain Likely

    • 39
    • 59

    Rain Likely

    • 40
    • 62

    Chance Rain

Today 21 Feb Northwestern Mendocino Interior

Mostly cloudy. Chance of snow in the morning. Chance of rain through the day. Breezy. Snow level 3000 feet in the morning. Highs 43 to 53. Southeast wind around 20 Mph in the Valleys and southeast 20 to 30 Mph at higher elevation.

Tonight 21 Feb Northwestern Mendocino Interior

Rain likely in the Evening, then rain overnight. Breezy. Lows 35 to 45. Southeast wind around 20 Mph in the Valleys and southeast 20 to 35 Mph at higher elevation.

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Arnold Temperature Statistics

February Temperature

Ukiah Municipal Airport (28.6 miles)

  • Lowest 18 February, 2026

    32 °F

  • Average February

    50.5 °F

  • Highest 5 February, 2026

    75.7 °F

Climate (2021–Present)

Ukiah Municipal Airport (28.6 miles)

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  • Average Low 2021–2026

    47 °F

  • Average 2021–2026

    60.8 °F

  • Average High 2021–2026

    76.1 °F
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