San Pablo Bay - The Sisters Weather Forecast

    • 58
    • 73

    Becoming Sunny

    • 58
    • 71

    Mostly Sunny

    • 58
    • 69

    Mostly Sunny

    • 57
    • 67

    Mostly Sunny

    • 58
    • 65

    Mostly Sunny

    • 59
    • 65

    Mostly Sunny

Today 21 Aug North Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Highs in the 80s to 90s. Southwest Winds 5 to 15 Mph.

Tonight 21 Aug North Bay Interior Valleys

Partly cloudy. Lows in the 50s to lower 60s. West Winds 5 to 10 Mph.

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San Pablo Bay - The Sisters Temperature Statistics

August Temperature

Novato / Gnoss Field (11.8 miles)

  • Lowest 2 August, 2025

    48.2 °F

  • Average August

    65.2 °F

  • Highest 8 August, 2025

    96.8 °F

Climate (2020–Present)

Novato / Gnoss Field (11.8 miles)

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  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    57.5 °F

  • Average High 2020–2025

    72.5 °F
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