Mill Valley Weather Forecast

    • 50
    • 64

    Mostly Sunny

    • 55
    • 68

    Partly Sunny

    • 52
    • 71

    Chance Rain Showers

    • 53
    • 78

    Sunny

    • 53
    • 81

    Mostly Sunny

    • 52
    • 73

    Mostly Sunny

Today 17 Sep North Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the mid 60s to lower 80s. South Winds 10 to 20 Mph.

Tonight 17 Sep North Bay Interior Valleys

Mostly clear in the evening then becoming partly cloudy. Patchy fog after midnight. Lows in the 40s to mid 50s. Southwest Winds 10 to 20 Mph.

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  • Temperature Real-Time

Mill Valley Temperature Statistics

September Temperature

Novato / Gnoss Field (16.2 miles)

  • Lowest 1 September, 2021

    46.4 °F
  • Average September

    63.1 °F
  • Highest 6 September, 2021

    96.8 °F

Climate (2010–Present)

Novato / Gnoss Field (16.2 miles)

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  • Average Low 2010–Present

    45.8 °F
  • Average 2010–Present

    58.1 °F
  • Average High 2010–Present

    73.5 °F
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