San Pablo Bay - Rat Rock Weather Forecast

    • 55
    • 67

    Mostly Sunny

    • 56
    • 69

    Mostly Sunny

    • 56
    • 67

    Mostly Sunny

    • 59
    • 74

    Mostly Sunny

    • 59
    • 78

    Partly Sunny

    • 62
    • 75

    Slight Chance Rain

    • 60
    • 75

    Partly Sunny

Today 4 Sep North Bay Interior Valleys

Sunny. Highs in the mid 60s to upper 70s. West Winds 10 to 20 Mph.

Tonight 4 Sep North Bay Interior Valleys

Mostly clear except patchy fog after midnight. Lows in the 40s to mid 50s. West Winds 10 to 20 Mph. Becoming 5 to 10 Mph after midnight.

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San Pablo Bay - Rat Rock Temperature Statistics

September Temperature

Novato / Gnoss Field (10.6 miles)

  • Lowest 2 September, 2026

    57.2 °F

  • Average September

    65.4 °F

  • Highest 2 September, 2026

    77 °F

Climate (2021–2026)

Novato / Gnoss Field (10.6 miles)

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  • Average Low 2021–2026

    46.9 °F

  • Average 2021–2026

    57.8 °F

  • Average High 2021–2026

    72.5 °F
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