Tomales Bay - Marshall Weather Forecast

    • 48
    • 58

    Gradual Clearing

    • 47
    • 65

    Mostly Sunny

    • 46
    • 68

    Mostly Sunny

    • 48
    • 69

    Partly Sunny

    • 47
    • 65

    Partly Sunny

    • 47
    • 64

    Partly Sunny

    • 48
    • 64

    Mostly Cloudy

Today 22 Oct Coastal North Bay Including Point Reyes National Seashore

Mostly cloudy. A chance of Showers. Highs around 60. West Winds around 10 Mph.

Tonight 22 Oct Coastal North Bay Including Point Reyes National Seashore

Mostly cloudy in the evening then becoming partly cloudy. Lows in the upper 40s. Northwest Winds 5 to 10 Mph.

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Tomales Bay - Marshall Temperature Statistics

October Temperature

Petaluma Municipal Airport (16.8 miles)

  • Lowest 13 October, 2026

    39.2 °F

  • Average October

    64.7 °F

  • Highest 3 October, 2026

    98.6 °F

Climate (2021–2026)

Petaluma Municipal Airport (16.8 miles)

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  • Average Low 2021–2026

    44.7 °F

  • Average 2021–2026

    55.3 °F

  • Average High 2021–2026

    68.6 °F
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