San Quentin Weather Forecast

    • 55
    • 76

    Sunny

    • 53
    • 79

    Mostly Sunny

    • 51
    • 71

    Partly Sunny

    • 53
    • 74

    Mostly Sunny

    • 55
    • 75

    Mostly Sunny

    • 56
    • 77

    Mostly Sunny

    • 56
    • 75

    Partly Sunny

Today 28 Oct North Bay Interior Valleys

Sunny. Highs in the upper 60s to lower 80s. Southwest Winds 5 to 10 Mph.

Tonight 28 Oct North Bay Interior Valleys

Clear. Lows in the upper 40s to lower 60s. Northwest Winds up to 5 Mph.

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San Quentin Temperature Statistics

October Temperature

Novato / Gnoss Field (14.3 miles)

  • Lowest 17 October, 2025

    42.8 °F

  • Average October

    60 °F

  • Highest 21 October, 2025

    84.2 °F

Climate (2020–Present)

Novato / Gnoss Field (14.3 miles)

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  • Average Low 2020–2025

    45.9 °F

  • Average 2020–2025

    57.3 °F

  • Average High 2020–2025

    72.3 °F
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