Mount Pierce Weather Forecast

    • 60
    • 67

    Mostly Cloudy

    • 59
    • 73

    Partly Sunny

    • 56
    • 71

    Partly Sunny

    • 57
    • 69

    Mostly Sunny

    • 58
    • 74

    Mostly Sunny

    • 59
    • 72

    Chance Rain

Today 18 Sep Southwestern Humboldt

Mostly cloudy. Highs 74 to 89. North wind 5 to 15 Mph.

Tonight 18 Sep Southwestern Humboldt

Mostly cloudy. Slight chance of rain Showers. Lows 53 to 63. Northeast wind around 10 Mph.

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Mount Pierce Temperature Statistics

September Temperature

Fortuna Rohnerville Airport (9.3 miles)

  • Lowest 7 September, 2025

    51.8 °F

  • Average September

    59 °F

  • Highest 14 September, 2025

    71.6 °F

Climate (2020–Present)

Fortuna Rohnerville Airport (9.3 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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