Arcata Bay Weather Forecast

    • 50
    • 59

    Mostly Cloudy

    • 48
    • 58

    Mostly Cloudy

    • 48
    • 56

    Partly Sunny

    • 49
    • 59

    Partly Sunny

    • 49
    • 58

    Mostly Cloudy

    • 51
    • 57

    Chance Rain

    • 52
    • 57

    Rain

Today 9 Dec Northern Humboldt Coast

Mostly cloudy. Patchy fog. Highs 57 to 67. Southeast wind around 5 Mph shifting to the northwest in the afternoon.

Tonight 9 Dec Northern Humboldt Coast

Partly cloudy early in the evening then becoming mostly cloudy. Patchy fog. Lows 42 to 52. North wind around 5 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Arcata Bay Temperature Statistics

December Temperature

Arcata / Eureka, Arcata Airport (9.3 miles)

  • Lowest 1 December, 2025

    37 °F

  • Average December

    47.7 °F

  • Highest 7 December, 2025

    55.9 °F

Climate (2020–Present)

Arcata / Eureka, Arcata Airport (9.3 miles)

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  • Average Low 2020–2025

    45.4 °F

  • Average 2020–2025

    52.1 °F

  • Average High 2020–2025

    59.3 °F
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