Sonoma Mountain Weather Forecast

    • 47
    • 56

    Increasing Clouds

    • 46
    • 55

    Decreasing Clouds

    • 48
    • 55

    Partly Sunny

    • 50
    • 57

    Partly Sunny

    • 50
    • 60

    Partly Sunny

    • 48
    • 60

    Mostly Sunny

    • 47
    • 59

    Mostly Sunny

Today 6 Dec North Bay Interior Valleys

Sunny. Highs in the lower 50s to mid 60s. Southwest Winds 5 to 10 Mph.

Tonight 6 Dec North Bay Interior Valleys

Partly cloudy late in the evening then becoming mostly cloudy. Patchy fog. Lows in the 40s. Northwest Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Sonoma Mountain Temperature Statistics

December Temperature

Petaluma Municipal Airport (4.3 miles)

  • Lowest 4 December, 2025

    33.8 °F

  • Average December

    46.5 °F

  • Highest 3 December, 2025

    66.2 °F

Climate (2020–Present)

Petaluma Municipal Airport (4.3 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    44.6 °F

  • Average 2020–2025

    55.1 °F

  • Average High 2020–2025

    68.7 °F
Get WillyWeather+ to remove ads