Mill Valley Weather Forecast

    • 55
    • 78

    Becoming Sunny

    • 55
    • 87

    Mostly Sunny

    • 53
    • 74

    Mostly Sunny

    • 54
    • 74

    Partly Sunny

    • 55
    • 74

    Partly Sunny

    • 56
    • 72

    Partly Sunny

Today 8 Aug North Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Highs in the upper 70s to mid 90s. Southwest Winds 5 to 15 Mph.

Tonight 8 Aug North Bay Interior Valleys

Partly cloudy. Patchy fog. Lows in the lower 50s to mid 60s. Southwest Winds 10 to 20 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Mill Valley Temperature Statistics

August Temperature

Novato / Gnoss Field (16.2 miles)

  • Lowest 1 August, 2026

    53.6 °F

  • Average August

    68.1 °F

  • Highest 2 August, 2026

    98.6 °F

Climate (2021–2026)

Novato / Gnoss Field (16.2 miles)

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

  • Average Low 2021–2026

    46.9 °F

  • Average 2021–2026

    57.8 °F

  • Average High 2021–2026

    72.5 °F
Get WillyWeather+ to remove ads