Island Mountain Weather Forecast

    • 39
    • 55

    Increasing Clouds

    • 32
    • 53

    Partly Sunny

    • 35
    • 54

    Partly Sunny

    • 39
    • 54

    Partly Sunny

    • 40
    • 55

    Partly Sunny

    • 39
    • 50

    Slight Chance Rain

Today 1 Dec Northeastern Mendocino Interior

Sunny. Widespread frost in the morning. Highs 51 to 66.

Tonight 1 Dec Northeastern Mendocino Interior

Mostly cloudy. Widespread frost overnight. Lows 34 to 44.

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Island Mountain Temperature Statistics

December Temperature

Fortuna Rohnerville Airport (52.8 miles)

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  • Average December

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Climate (2020–Present)

Fortuna Rohnerville Airport (52.8 miles)

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  • Average Low 2020–2025

    45.2 °F

  • Average 2020–2025

    51.2 °F

  • Average High 2020–2025

    59.5 °F
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