San Pablo Bay - Petaluma River Entrance Weather Forecast

    • 50
    • 80

    Decreasing Clouds

    • 51
    • 75

    Partly Sunny

    • 49
    • 70

    Partly Sunny

    • 50
    • 72

    Mostly Sunny

    • 50
    • 77

    Mostly Sunny

    • 50
    • 80

    Mostly Sunny

Today 11 May North Bay Interior Valleys

Mostly cloudy in the morning then becoming partly cloudy. Patchy fog in the morning. Highs in the 70s to 80s. South Winds 5 to 10 Mph.

Tonight 11 May North Bay Interior Valleys

Mostly clear in the evening then becoming partly cloudy. Patchy fog after midnight. Lows in the upper 40s to mid 60s. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Pablo Bay - Petaluma River Entrance Temperature Statistics

May Temperature

Novato / Gnoss Field (3.7 miles)

  • Lowest 4 May, 2026

    46.4 °F

  • Average May

    58.9 °F

  • Highest 6 May, 2026

    77 °F

Climate (2021–Present)

Novato / Gnoss Field (3.7 miles)

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  • Average Low 2021–2026

    46.7 °F

  • Average 2021–2026

    57.7 °F

  • Average High 2021–2026

    72.5 °F
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