Eureka Weather Forecast

    • 55
    • 68

    Patchy Fog

    • 55
    • 66

    Mostly Cloudy

    • 55
    • 66

    Mostly Cloudy

    • 55
    • 68

    Partly Sunny

    • 54
    • 64

    Partly Sunny

    • 55
    • 64

    Partly Sunny

    • 55
    • 63

    Mostly Cloudy

Today 5 Aug Northern Coastal Humboldt

Partly cloudy until early afternoon then clearing. Patchy fog and smoke in the morning. Highs 71 to 86. West wind around 10 Mph.

Tonight 5 Aug Northern Coastal Humboldt

Partly cloudy early in the evening then becoming mostly cloudy. Patchy fog. Lows 50 to 60. West wind around 5 Mph in the evening becoming light.

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Eureka Temperature Statistics

August Temperature

Arcata / Eureka, Arcata Airport (11.8 miles)

  • Lowest 3 August, 2026

    46.9 °F

  • Average August

    59.2 °F

  • Highest 1 August, 2026

    71.7 °F

Climate (2021–2026)

Arcata / Eureka, Arcata Airport (11.8 miles)

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  • Average Low 2021–2026

    45.7 °F

  • Average 2021–2026

    52.5 °F

  • Average High 2021–2026

    59.7 °F
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