Island Mountain Weather Forecast

    • 59
    • 84

    Sunny

    • 58
    • 83

    Mostly Sunny

    • 53
    • 78

    Mostly Sunny

    • 50
    • 70

    Mostly Sunny

    • 51
    • 73

    Sunny

    • 54
    • 77

    Sunny

Today 16 Jun Northeastern Interior Mendocino

Sunny. Highs 90 to 105.

Tonight 16 Jun Northeastern Interior Mendocino

Mostly clear. Lows 58 to 68.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Island Mountain Temperature Statistics

June Temperature

Fortuna Rohnerville Airport (52.8 miles)

  • Lowest 1 June, 2026

    42.8 °F

  • Average June

    54.2 °F

  • Highest 3 June, 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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