Bel Marin Keys Weather Forecast

    • 59
    • 91

    Sunny

    • 54
    • 84

    Increasing Clouds

    • 53
    • 78

    Partly Sunny

    • 54
    • 77

    Partly Sunny

    • 56
    • 76

    Mostly Cloudy

    • 55
    • 76

    Mostly Cloudy

    • 55
    • 79

    Partly Sunny

Today 15 Jul North Bay Interior Valleys

Sunny. Highs in the 80s to 90s. West Winds 10 to 20 Mph.

Tonight 15 Jul North Bay Interior Valleys

Mostly clear. Lows in the 50s to mid 60s. West Winds 10 to 20 Mph.

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Bel Marin Keys Temperature Statistics

July Temperature

Novato / Gnoss Field (4.3 miles)

  • Lowest 1 July, 2026

    50 °F

  • Average July

    64 °F

  • Highest 13 July, 2026

    96.8 °F

Climate (2021–2026)

Novato / Gnoss Field (4.3 miles)

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  • Average Low 2021–2026

    46.8 °F

  • Average 2021–2026

    57.7 °F

  • Average High 2021–2026

    72.5 °F
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