Tomales Bay - Marshall Weather Forecast

    • 54
    • 74

    Increasing Clouds

    • 56
    • 68

    Chance Rain Showers

    • 55
    • 68

    Slight Chance Rain Showers

    • 55
    • 68

    Partly Sunny

    • 56
    • 71

    Mostly Sunny

    • 57
    • 72

    Chance Rain Showers

Today 17 Sep Coastal North Bay Including Point Reyes National Seashore

Partly cloudy in the morning then becoming sunny. Areas of dense fog in the morning. Highs in the upper 60s to lower 80s. West Winds 5 to 10 Mph.

Tonight 17 Sep Coastal North Bay Including Point Reyes National Seashore

Partly cloudy in the evening then becoming mostly cloudy. Lows in the mid 50s. West Winds 5 to 10 Mph.

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  • Temperature Real-Time

Tomales Bay - Marshall Temperature Statistics

September Temperature

Petaluma Municipal Airport (16.8 miles)

  • Lowest 14 September, 2025

    48.2 °F

  • Average September

    62.9 °F

  • Highest 1 September, 2025

    93.2 °F

Climate (2020–Present)

Petaluma Municipal Airport (16.8 miles)

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  • Average Low 2020–2025

    44.4 °F

  • Average 2020–2025

    55.2 °F

  • Average High 2020–2025

    69.1 °F
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