San Rafael Bay - West Marin Island Weather Forecast

    • 53
    • 62

    Increasing Clouds

    • 52
    • 61

    Partly Sunny

    • 54
    • 63

    Partly Sunny

    • 51
    • 61

    Partly Sunny

    • 50
    • 60

    Partly Sunny

    • 49
    • 58

    Chance Rain

Today 26 Oct North Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the 60s. West Winds 5 to 10 Mph increasing to 10 to 20 Mph in the afternoon.

Tonight 26 Oct North Bay Interior Valleys

Mostly clear except patchy fog after midnight. Lows in the upper 30s to lower 50s. Northwest Winds 10 to 20 Mph.

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San Rafael Bay - West Marin Island Temperature Statistics

October Temperature

Novato / Gnoss Field (12.4 miles)

  • Lowest 13 October, 2026

    42.8 °F

  • Average October

    62.5 °F

  • Highest 3 October, 2026

    100.4 °F

Climate (2021–2026)

Novato / Gnoss Field (12.4 miles)

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  • Average Low 2021–2026

    47 °F

  • Average 2021–2026

    57.9 °F

  • Average High 2021–2026

    72.6 °F
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