Westhaven-Moonstone Weather Forecast

    • 52
    • 63

    Decreasing Clouds

    • 52
    • 61

    Slight Chance Rain Showers

    • 51
    • 62

    Mostly Sunny

    • 52
    • 63

    Partly Sunny

    • 53
    • 63

    Partly Sunny

    • 54
    • 64

    Partly Sunny

Today 11 Sep Northern Coastal Humboldt

Mostly cloudy in the morning then becoming partly cloudy. Patchy fog in the morning. Highs 60 to 70. West wind 5 to 15 Mph.

Tonight 11 Sep Northern Coastal Humboldt

Partly cloudy in the evening then becoming mostly cloudy. Patchy fog. Lows 46 to 56. North wind up to 10 Mph.

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Westhaven-Moonstone Temperature Statistics

September Temperature

Arcata / Eureka, Arcata Airport (3.7 miles)

  • Lowest 5 September, 2026

    46.7 °F

  • Average September

    58.7 °F

  • Highest 1 September, 2026

    70.6 °F

Climate (2021–2026)

Arcata / Eureka, Arcata Airport (3.7 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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