San Pablo Bay - Petaluma River Entrance Weather Forecast

    • 51
    • 57

    Rain

    • 48
    • 57

    Rain

    • 50
    • 55

    Rain

    • 46
    • 52

    Rain

    • 40
    • 52

    Rain Likely

    • 39
    • 52

    Slight Chance Rain

Today 22 Dec North Bay Interior Valleys

Patchy dense fog in the morning. Rain likely in the Morning, then rain in the afternoon. Highs in the 50s. Southwest Winds 10 to 15 Mph with Gusts to around 30 Mph.

Tonight 22 Dec North Bay Interior Valleys

Patchy fog. Rain. Lows in the 40s to mid 50s. Northwest Winds up to 5 Mph increasing to southeast 10 to 15 Mph after midnight.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Pablo Bay - Petaluma River Entrance Temperature Statistics

December Temperature

Novato / Gnoss Field (3.7 miles)

  • Lowest 2 December, 2025

    37.4 °F

  • Average December

    47.2 °F

  • Highest 3 December, 2025

    71.6 °F

Climate (2020–Present)

Novato / Gnoss Field (3.7 miles)

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  • Average Low 2020–2025

    46.2 °F

  • Average 2020–2025

    57.4 °F

  • Average High 2020–2025

    72.3 °F
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