San Marin Weather Forecast

    • 46
    • 75

    Mostly Sunny

    • 46
    • 71

    Decreasing Clouds

    • 44
    • 66

    Mostly Sunny

    • 46
    • 67

    Partly Sunny

    • 47
    • 63

    Mostly Cloudy

    • 45
    • 61

    Partly Sunny

    • 44
    • 61

    Partly Sunny

Today 24 Oct North Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Patchy fog. Highs in the 50s to mid 60s.

Tonight 24 Oct North Bay Interior Valleys

Mostly clear in the evening then becoming partly cloudy. Lows in the upper 30s to lower 50s. Southwest Winds up to 5 Mph in the evening. Becoming light.

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San Marin Temperature Statistics

October Temperature

Novato / Gnoss Field (2.5 miles)

  • Lowest 13 October, 2026

    42.8 °F

  • Average October

    62.9 °F

  • Highest 3 October, 2026

    100.4 °F

Climate (2021–2026)

Novato / Gnoss Field (2.5 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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