North Trinity Mountain Weather Forecast

    • 47
    • 61

    Slight Chance Thunderstorms

    • 48
    • 60

    Mostly Sunny

    • 52
    • 63

    Sunny

    • 55
    • 69

    Mostly Sunny

    • 54
    • 69

    Mostly Sunny

    • 50
    • 66

    Mostly Sunny

Today 16 Sep Northeastern Interior Humboldt

Sunny in the morning then becoming partly cloudy. Patchy valley fog in the morning. Slight chance of Showers and Thunderstorms in the afternoon. Highs 74 to 89.

Tonight 16 Sep Northeastern Interior Humboldt

Partly cloudy. Slight chance of Showers and Thunderstorms in the evening. Lows 47 to 57.

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North Trinity Mountain Temperature Statistics

September Temperature

Arcata / Eureka, Arcata Airport (33.6 miles)

  • Lowest 5 September, 2026

    46.7 °F

  • Average September

    58.8 °F

  • Highest 9 September, 2026

    75.7 °F

Climate (2021–2026)

Arcata / Eureka, Arcata Airport (33.6 miles)

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  • Average Low 2021–2026

    45.8 °F

  • Average 2021–2026

    52.6 °F

  • Average High 2021–2026

    59.8 °F
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