Island Mountain Weather Forecast

    • 40
    • 47

    Rain

    • 39
    • 48

    Rain Showers

    • 35
    • 50

    Chance Rain Showers

    • 39
    • 59

    Mostly Sunny

    • 42
    • 65

    Mostly Sunny

    • 43
    • 62

    Partly Sunny

    • 42
    • 58

    Partly Sunny

Today 20 Apr Northeastern Mendocino Interior

Rain in the Morning, then rain Showers and isolated Thunderstorms in the afternoon. Snow level 6000 feet in the afternoon. Highs 47 to 62.

Tonight 20 Apr Northeastern Mendocino Interior

Chance of rain Showers in the Evening, then rain Showers and snow Showers likely overnight. Snow level 5000 to 5500 feet. Snow Accumulations up to 1 inch. Lows 34 to 44.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Island Mountain Temperature Statistics

April Temperature

Fortuna Rohnerville Airport (52.8 miles)

  • Lowest 3 April, 2026

    33.8 °F

  • Average April

    49.9 °F

  • Highest 5 April, 2026

    69.8 °F

Climate (2021–Present)

Fortuna Rohnerville Airport (52.8 miles)

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  • Average Low 2021–2026

    45.3 °F

  • Average 2021–2026

    51.4 °F

  • Average High 2021–2026

    59.7 °F
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