Arnold Weather Forecast

    • 34
    • 59

    Partly Sunny

    • 38
    • 65

    Mostly Sunny

    • 41
    • 67

    Mostly Sunny

    • 39
    • 58

    Partly Sunny

    • 35
    • 58

    Partly Sunny

    • 38
    • 60

    Partly Sunny

Today 22 Apr Northwestern Mendocino Interior

Mostly cloudy early in the morning then becoming partly cloudy. Patchy valley fog in the morning. Slight chance of rain Showers through the day. Highs 53 to 64.

Tonight 22 Apr Northwestern Mendocino Interior

Mostly clear. Patchy valley fog and frost overnight. Lows 32 to 42.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Arnold Temperature Statistics

April Temperature

Ukiah Municipal Airport (28.6 miles)

  • Lowest 17 April, 2026

    35.7 °F

  • Average April

    57.6 °F

  • Highest 5 April, 2026

    84.7 °F

Climate (2021–Present)

Ukiah Municipal Airport (28.6 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    61 °F

  • Average High 2021–2026

    76.3 °F
Get WillyWeather+ to remove ads