San Rafael Bay - West Marin Island Weather Forecast

    • 46
    • 52

    Decreasing Clouds

    • 46
    • 57

    Increasing Clouds

    • 51
    • 55

    Mostly Cloudy

    • 49
    • 58

    Partly Sunny

    • 49
    • 59

    Mostly Cloudy

    • 50
    • 59

    Mostly Cloudy

    • 52
    • 59

    Mostly Cloudy

Today 25 Jan North Bay Interior Valleys

Cloudy. Highs in the 40s to upper 50s. East Winds 10 to 15 Mph.

Tonight 25 Jan North Bay Interior Valleys

Mostly cloudy. Lows in the 30s to mid 40s. East Winds 5 to 10 Mph.

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San Rafael Bay - West Marin Island Temperature Statistics

January Temperature

Novato / Gnoss Field (12.4 miles)

  • Lowest 12 January, 2026

    33.8 °F

  • Average January

    50.4 °F

  • Highest 22 January, 2026

    68 °F

Climate (2021–Present)

Novato / Gnoss Field (12.4 miles)

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  • Average Low 2021–2026

    46.3 °F

  • Average 2021–2026

    57.4 °F

  • Average High 2021–2026

    72.3 °F
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