Petaluma River - Black John Slough Entrance Weather Forecast

    • 51
    • 69

    Increasing Clouds

    • 56
    • 68

    Rain

    • 53
    • 65

    Rain

    • 52
    • 69

    Partly Sunny

    • 52
    • 70

    Patchy Fog

    • 52
    • 71

    Partly Sunny

Today 3 Nov North Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the 60s to lower 70s. Southwest Winds 5 to 15 Mph.

Tonight 3 Nov North Bay Interior Valleys

Mostly cloudy. Patchy fog. A slight chance of rain. Lows in the upper 40s to mid 50s. Southwest Winds 5 to 10 Mph becoming southeast after midnight.

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Petaluma River - Black John Slough Entrance Temperature Statistics

November Temperature

Novato / Gnoss Field (1.9 miles)

  • Lowest 1 November, 2025

    42.8 °F

  • Average November

    57.8 °F

  • Highest 1 November, 2025

    80.6 °F

Climate (2020–Present)

Novato / Gnoss Field (1.9 miles)

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  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    57.3 °F

  • Average High 2020–2025

    72.3 °F
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