San Quentin Weather Forecast

    • 55
    • 81

    Partly Sunny

    • 56
    • 86

    Mostly Sunny

    • 59
    • 88

    Sunny

    • 59
    • 89

    Mostly Sunny

    • 60
    • 89

    Sunny

    • 58
    • 89

    Mostly Sunny

    • 54
    • 80

    Mostly Cloudy

Today 15 Mar North Bay Interior Valleys

Sunny. Highs in the mid 70s to upper 80s. Northwest Winds 5 to 10 Mph.

Tonight 15 Mar North Bay Interior Valleys

Mostly clear in the evening then becoming partly cloudy. Lows in the lower 50s to mid 60s. Northwest Winds 5 to 10 Mph.

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San Quentin Temperature Statistics

March Temperature

Novato / Gnoss Field (14.3 miles)

  • Lowest 10 March, 2026

    42.8 °F

  • Average March

    59.4 °F

  • Highest 7 March, 2026

    80.6 °F

Climate (2021–Present)

Novato / Gnoss Field (14.3 miles)

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  • Average Low 2021–2026

    46.5 °F

  • Average 2021–2026

    57.6 °F

  • Average High 2021–2026

    72.4 °F
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