Arena Rock Marine Natural Preserve Weather Forecast

    • 54
    • 56

    Mostly Cloudy

    • 54
    • 57

    Mostly Cloudy

    • 54
    • 58

    Partly Sunny

    • 54
    • 62

    Partly Sunny

    • 55
    • 63

    Mostly Cloudy

    • 54
    • 61

    Partly Sunny

Today 20 Sep Coastal Mendocino

Mostly cloudy then becoming partly cloudy early in the afternoon then becoming mostly cloudy. Patchy fog in the morning. Highs 61 to 76. Northwest wind around 10 Mph.

Tonight 20 Sep Coastal Mendocino

Mostly cloudy. Patchy fog in the evening. Areas of fog overnight. Lows 46 to 56. Northwest wind around 5 Mph.

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Arena Rock Marine Natural Preserve Temperature Statistics

September Temperature

Ukiah Municipal Airport (31.1 miles)

  • Lowest 6 September, 2026

    45.6 °F

  • Average September

    68.4 °F

  • Highest 10 September, 2026

    100.7 °F

Climate (2021–2026)

Ukiah Municipal Airport (31.1 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    61 °F

  • Average High 2021–2026

    76.1 °F
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