Petaluma River - Black John Slough Entrance Weather Forecast

    • 45
    • 68

    Mostly Sunny

    • 47
    • 67

    Partly Sunny

    • 46
    • 65

    Partly Sunny

    • 46
    • 65

    Areas Fog

    • 44
    • 62

    Chance Rain

    • 43
    • 58

    Chance Rain

Today 4 Feb North Bay Interior Valleys

Sunny. Patchy dense fog in the morning. Highs in the lower 60s to mid 70s. East Winds 5 to 10 Mph.

Tonight 4 Feb North Bay Interior Valleys

Mostly clear. Lows in the upper 30s to lower 50s. Northeast Winds 5 to 10 Mph.

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Petaluma River - Black John Slough Entrance Temperature Statistics

February Temperature

Novato / Gnoss Field (1.9 miles)

  • Lowest 1 February, 2026

    41 °F

  • Average February

    53 °F

  • Highest 1 February, 2026

    71.6 °F

Climate (2021–Present)

Novato / Gnoss Field (1.9 miles)

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  • Average Low 2021–2026

    46.3 °F

  • Average 2021–2026

    57.4 °F

  • Average High 2021–2026

    72.3 °F
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