San Pablo Bay - Rat Rock Weather Forecast

    • 58
    • 73

    Mostly Sunny

    • 58
    • 74

    Partly Sunny

    • 58
    • 68

    Partly Sunny

    • 58
    • 68

    Mostly Sunny

    • 58
    • 73

    Mostly Sunny

Today 18 Sep North Bay Interior Valleys

Partly cloudy. Lows in the mid 50s to lower 60s. Highs in the mid 70s to lower 90s.

Tonight 18 Sep North Bay Interior Valleys

Mostly clear except patchy fog after midnight. Lows in the 50s to lower 60s. West Winds 5 to 15 Mph.

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San Pablo Bay - Rat Rock Temperature Statistics

September Temperature

Novato / Gnoss Field (10.6 miles)

  • Lowest 6 September, 2026

    48.2 °F

  • Average September

    66.8 °F

  • Highest 9 September, 2026

    100.4 °F

Climate (2021–2026)

Novato / Gnoss Field (10.6 miles)

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  • Average Low 2021–2026

    47 °F

  • Average 2021–2026

    57.8 °F

  • Average High 2021–2026

    72.5 °F
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