Rio Dell Weather Forecast

    • 54
    • 78

    Mostly Sunny

    • 54
    • 70

    Partly Sunny

    • 55
    • 68

    Mostly Cloudy

    • 54
    • 69

    Mostly Cloudy

    • 54
    • 70

    Mostly Cloudy

    • 54
    • 69

    Partly Sunny

Today 16 Sep Northern Humboldt Coast

Sunny. Highs 70 to 85. West wind around 10 Mph.

Tonight 16 Sep Northern Humboldt Coast

Partly cloudy. Patchy fog. Lows 49 to 59. Northwest wind around 5 Mph.

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Rio Dell Temperature Statistics

September Temperature

Fortuna Rohnerville Airport (3.7 miles)

  • Lowest 7 September, 2025

    51.8 °F

  • Average September

    58.7 °F

  • Highest 13 September, 2025

    69.8 °F

Climate (2020–Present)

Fortuna Rohnerville Airport (3.7 miles)

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  • Average Low 2020–2025

    45.1 °F

  • Average 2020–2025

    51.2 °F

  • Average High 2020–2025

    59.5 °F
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