Loch Lomond Marina Weather Forecast

    • 60
    • 81

    Increasing Clouds

    • 61
    • 70

    Chance Rain Showers

    • 60
    • 72

    Chance Rain Showers

    • 60
    • 73

    Mostly Sunny

    • 61
    • 77

    Sunny

    • 62
    • 78

    Slight Chance Rain Showers

Today 17 Sep North Bay Interior Valleys

Sunny. Highs in the lower 80s to mid 90s. Southwest Winds 5 to 15 Mph.

Tonight 17 Sep North Bay Interior Valleys

Partly cloudy. Lows in the 50s to mid 60s. West Winds 5 to 15 Mph.

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  • Temperature Real-Time

Loch Lomond Marina Temperature Statistics

September Temperature

Novato / Gnoss Field (12.4 miles)

  • Lowest 1 September, 2025

    51.8 °F

  • Average September

    66 °F

  • Highest 1 September, 2025

    89.6 °F

Climate (2020–Present)

Novato / Gnoss Field (12.4 miles)

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  • Average Low 2020–2025

    46 °F

  • Average 2020–2025

    57.5 °F

  • Average High 2020–2025

    72.6 °F
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