Petaluma River - San Antonio Creek Entrance Weather Forecast

    • 47
    • 57

    Cloudy

    • 46
    • 61

    Mostly Cloudy

    • 42
    • 58

    Partly Sunny

    • 41
    • 60

    Partly Sunny

    • 41
    • 57

    Mostly Cloudy

    • 41
    • 58

    Mostly Cloudy

Today 21 Jan North Bay Interior Valleys

Cloudy. Areas of fog in the morning. Highs in the mid 50s to lower 60s. Northeast Winds up to 5 Mph. Becoming south in the afternoon.

Tonight 21 Jan North Bay Interior Valleys

Mostly cloudy. Patchy dense fog. Lows in the 40s to lower 50s. Light Winds. Becoming northwest up to 5 Mph after midnight.

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Petaluma River - San Antonio Creek Entrance Temperature Statistics

January Temperature

Novato / Gnoss Field (1.2 miles)

  • Lowest 12 January, 2026

    33.8 °F

  • Average January

    50.5 °F

  • Highest 15 January, 2026

    66.2 °F

Climate (2021–Present)

Novato / Gnoss Field (1.2 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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