Six Rivers National Forest Weather Forecast

    • 62
    • 95

    Partly Sunny

    • 60
    • 91

    Partly Sunny

    • 53
    • 88

    Mostly Sunny

    • 55
    • 88

    Sunny

    • 58
    • 97

    Mostly Sunny

    • 57
    • 93

    Slight Chance Rain

Today 18 Sep Northern Humboldt Interior

Mostly sunny early in the morning then becoming mostly cloudy. Highs 84 to 99.

Tonight 18 Sep Northern Humboldt Interior

Mostly cloudy. Slight chance of rain and isolated Thunderstorms in the Evening, then slight chance of rain Showers overnight. Lows 55 to 65.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Six Rivers National Forest Temperature Statistics

September Temperature

Arcata / Eureka, Arcata Airport (34.2 miles)

  • Lowest 8 September, 2025

    51.1 °F

  • Average September

    58.9 °F

  • Highest 8 September, 2025

    70 °F

Climate (2020–Present)

Arcata / Eureka, Arcata Airport (34.2 miles)

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  • Average Low 2020–2025

    45.3 °F

  • Average 2020–2025

    52.1 °F

  • Average High 2020–2025

    59.3 °F
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