Greenbrae Weather Forecast

    • 56
    • 79

    Mostly Sunny

    • 56
    • 79

    Mostly Sunny

    • 56
    • 86

    Mostly Sunny

    • 54
    • 82

    Mostly Sunny

    • 55
    • 77

    Mostly Sunny

    • 55
    • 80

    Mostly Sunny

    • 56
    • 83

    Mostly Sunny

Today 12 Sep North Bay Interior Valleys

Sunny. Highs in the lower 70s to mid 80s. West Winds 10 to 20 Mph with Gusts to around 35 Mph.

Tonight 12 Sep North Bay Interior Valleys

Mostly clear. Breezy. Lows in the 40s to upper 50s. West Winds 20 to 30 Mph decreasing to 10 to 20 Mph after midnight. Gusts up to 45 Mph.

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Greenbrae Temperature Statistics

September Temperature

Novato / Gnoss Field (13 miles)

  • Lowest 6 September, 2026

    48.2 °F

  • Average September

    68.1 °F

  • Highest 9 September, 2026

    100.4 °F

Climate (2021–2026)

Novato / Gnoss Field (13 miles)

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  • Average Low 2021–2026

    47 °F

  • Average 2021–2026

    57.8 °F

  • Average High 2021–2026

    72.5 °F
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