San Marin Weather Forecast

    • 46
    • 56

    Mostly Cloudy

    • 40
    • 56

    Partly Sunny

    • 36
    • 52

    Mostly Sunny

    • 37
    • 53

    Partly Sunny

    • 38
    • 52

    Mostly Cloudy

    • 40
    • 54

    Partly Sunny

    • 41
    • 56

    Mostly Sunny

Today 6 Jan North Bay Interior Valleys

Mostly cloudy. Highs in the 50s. East Winds up to 5 Mph.

Tonight 6 Jan North Bay Interior Valleys

Mostly cloudy. Patchy fog. Lows in the 40s. West Winds up to 5 Mph.

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San Marin Temperature Statistics

January Temperature

Novato / Gnoss Field (2.5 miles)

  • Lowest 1 January, 2026

    48.2 °F

  • Average January

    54.8 °F

  • Highest 3 January, 2026

    62.6 °F

Climate (2021–Present)

Novato / Gnoss Field (2.5 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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