Tomales Bay - Marshall Weather Forecast

    • 44
    • 55

    Rain Showers Likely

    • 38
    • 54

    Mostly Sunny

    • 38
    • 54

    Mostly Sunny

    • 39
    • 55

    Mostly Sunny

    • 39
    • 56

    Mostly Sunny

    • 43
    • 55

    Mostly Cloudy

Today 26 Dec Coastal North Bay Including Point Reyes National Seashore

A chance of Showers in the morning. A slight chance of Thunderstorms. Showers likely in the afternoon. Some Thunderstorms may produce heavy rainfall. Highs in the mid 50s. Southwest Winds 10 to 20 Mph with Gusts to around 35 Mph.

Tonight 26 Dec Coastal North Bay Including Point Reyes National Seashore

Mostly cloudy in the evening then becoming partly cloudy. A chance of Showers in the evening. Lows in the mid 40s. Northwest Winds 5 to 15 Mph.

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Tomales Bay - Marshall Temperature Statistics

December Temperature

Petaluma Municipal Airport (16.8 miles)

  • Lowest 4 December, 2025

    33.8 °F

  • Average December

    46.8 °F

  • Highest 3 December, 2025

    66.2 °F

Climate (2020–Present)

Petaluma Municipal Airport (16.8 miles)

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  • Average Low 2020–2025

    44.6 °F

  • Average 2020–2025

    55.1 °F

  • Average High 2020–2025

    68.6 °F
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