Arnold Weather Forecast

    • 43
    • 56

    Rain

    • 40
    • 52

    Rain

    • 42
    • 51

    Rain

    • 40
    • 51

    Rain

    • 35
    • 48

    Rain

    • 31
    • 49

    Chance Rain

    • 32
    • 53

    Partly Sunny

Today 21 Dec Northwestern Mendocino Interior

Rain in the Morning, then rain Showers in the afternoon. Windy. Near steady temperature in the lower 50s. Rain may be heavy at Times in the morning. In the Valleys, south wind up to 20 Mph in the morning. At higher Elevation, southwest wind 20 to 30 Mph decreasing to up to 20 Mph in the afternoon. Gusts up to 45 Mph.

Tonight 21 Dec Northwestern Mendocino Interior

Cloudy. Chance of rain Showers through the night. Lows 38 to 48.

Graph Plots Open in Graphs
  • Temperature Forecast NOAA

  • Temperature Real-Time

Arnold Temperature Statistics

December Temperature

Ukiah Municipal Airport (28.6 miles)

  • Lowest 13 December, 2025

    30 °F
  • Average December

    48.5 °F
  • Highest 10 December, 2025

    72 °F

Climate (2020–Present)

Ukiah Municipal Airport (28.6 miles)

Take a look at our website widgetsAvailable free! Find Out More
  • Average Low 2020–2025

    47 °F
  • Average 2020–2025

    60.7 °F
  • Average High 2020–2025

    76 °F
Get WillyWeather+ to remove ads