Harry A. Merlo State Recreation Area Weather Forecast

    • 49
    • 66

    Partly Sunny

    • 48
    • 77

    Partly Sunny

    • 46
    • 71

    Partly Sunny

    • 46
    • 58

    Mostly Cloudy

    • 43
    • 53

    Mostly Cloudy

    • 43
    • 51

    Chance Rain

Today 14 Oct Northern Coastal Humboldt

Partly cloudy in the morning then clearing. Highs 61 to 74. East wind around 5 Mph shifting to the northwest in the afternoon.

Tonight 14 Oct Northern Coastal Humboldt

Mostly clear. Lows 45 to 55. Southwest wind around 5 Mph shifting to the east overnight.

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Harry A. Merlo State Recreation Area Temperature Statistics

October Temperature

Arcata / Eureka, Arcata Airport (14.3 miles)

  • Lowest 11 October, 2026

    36 °F

  • Average October

    53.3 °F

  • Highest 8 October, 2026

    62.7 °F

Climate (2021–2026)

Arcata / Eureka, Arcata Airport (14.3 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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