Mount Tamalpais State Park Weather Forecast

    • 53
    • 56

    Mostly Cloudy

    • 53
    • 56

    Partly Sunny

    • 55
    • 60

    Mostly Sunny

    • 56
    • 67

    Mostly Sunny

    • 56
    • 72

    Partly Sunny

    • 55
    • 68

    Partly Sunny

    • 56
    • 68

    Partly Sunny

Today 26 Sep Coastal North Bay Including Point Reyes National Seashore

Mostly cloudy. Highs in the 60s. West Winds 5 to 10 Mph.

Tonight 26 Sep Coastal North Bay Including Point Reyes National Seashore

Mostly cloudy. Patchy fog after midnight. Lows in the lower 50s. West Winds 5 to 10 Mph.

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Mount Tamalpais State Park Temperature Statistics

September Temperature

Novato / Gnoss Field (17.4 miles)

  • Lowest 6 September, 2026

    48.2 °F

  • Average September

    65.8 °F

  • Highest 9 September, 2026

    100.4 °F

Climate (2021–2026)

Novato / Gnoss Field (17.4 miles)

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  • Average Low 2021–2026

    47 °F

  • Average 2021–2026

    57.8 °F

  • Average High 2021–2026

    72.4 °F
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