Fortuna Weather Forecast

    • 53
    • 67

    Patchy Fog

    • 53
    • 68

    Increasing Clouds

    • 53
    • 68

    Partly Sunny

    • 53
    • 73

    Partly Sunny

    • 53
    • 69

    Partly Sunny

    • 53
    • 68

    Mostly Cloudy

    • 53
    • 68

    Mostly Cloudy

Today 14 Sep Northern Coastal Humboldt

Partly cloudy in the morning then clearing. Patchy fog in the morning. Highs 63 to 73. Northwest wind 5 to 15 Mph.

Tonight 14 Sep Northern Coastal Humboldt

Partly cloudy in the evening then becoming mostly cloudy. Patchy fog overnight. Lows 46 to 56. Northwest wind around 15 Mph becoming southwest around 5 Mph overnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Fortuna Temperature Statistics

September Temperature

Fortuna Rohnerville Airport (3.1 miles)

  • Lowest 4 September, 2026

    46.4 °F

  • Average September

    58.5 °F

  • Highest 9 September, 2026

    82.4 °F

Climate (2021–2026)

Fortuna Rohnerville Airport (3.1 miles)

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  • Average Low 2021–2026

    45.4 °F

  • Average 2021–2026

    51.5 °F

  • Average High 2021–2026

    59.8 °F
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