San Marin Weather Forecast

    • 56
    • 79

    Increasing Clouds

    • 54
    • 72

    Mostly Sunny

    • 52
    • 75

    Mostly Sunny

    • 53
    • 79

    Sunny

    • 55
    • 87

    Mostly Sunny

    • 55
    • 87

    Sunny

Today 16 Aug North Bay Interior Valleys

Sunny. Highs in the 70s to 80s. West Winds 10 to 20 Mph with Gusts to around 35 Mph.

Tonight 16 Aug North Bay Interior Valleys

Mostly clear in the evening then becoming partly cloudy. Patchy fog after midnight. Lows in the 50s. West Winds 10 to 20 Mph with Gusts to around 35 Mph.

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San Marin Temperature Statistics

August Temperature

Novato / Gnoss Field (2.5 miles)

  • Lowest 2 August, 2025

    48.2 °F

  • Average August

    64.7 °F

  • Highest 8 August, 2025

    96.8 °F

Climate (2020–Present)

Novato / Gnoss Field (2.5 miles)

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  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    57.5 °F

  • Average High 2020–2025

    72.6 °F
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