San Rafael Bay - West Marin Island Weather Forecast

    • 59
    • 70

    Mostly Sunny

    • 58
    • 72

    Sunny

    • 58
    • 74

    Sunny

    • 57
    • 76

    Mostly Sunny

    • 57
    • 79

    Mostly Sunny

    • 59
    • 81

    Mostly Sunny

Today 27 Jul North Bay Interior Valleys

Sunny. Highs in the upper 70s to lower 90s. West Winds 5 to 10 Mph increasing to 10 to 20 Mph in the afternoon.

Tonight 27 Jul North Bay Interior Valleys

Mostly clear. Lows in the mid 50s to lower 60s. West Winds 10 to 20 Mph.

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San Rafael Bay - West Marin Island Temperature Statistics

July Temperature

Novato / Gnoss Field (12.4 miles)

  • Lowest 1 July, 2026

    50 °F

  • Average July

    66.2 °F

  • Highest 14 July, 2026

    98.6 °F

Climate (2021–2026)

Novato / Gnoss Field (12.4 miles)

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  • Average Low 2021–2026

    46.9 °F

  • Average 2021–2026

    57.8 °F

  • Average High 2021–2026

    72.5 °F
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