Jewell Weather Forecast

    • 53
    • 66

    Decreasing Clouds

    • 51
    • 73

    Partly Sunny

    • 55
    • 82

    Mostly Sunny

    • 56
    • 81

    Partly Sunny

    • 52
    • 75

    Mostly Sunny

    • 50
    • 72

    Mostly Sunny

Today 21 Sep Marin Coastal Range

Partly cloudy in the morning then becoming sunny. Highs in the mid 60s to lower 70s. Southwest Winds 5 to 10 Mph.

Tonight 21 Sep Marin Coastal Range

Mostly clear in the evening then becoming partly cloudy. Lows in the mid 50s. West Winds 5 to 10 Mph.

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Jewell Temperature Statistics

September Temperature

Novato / Gnoss Field (12.4 miles)

  • Lowest 6 September, 2026

    48.2 °F

  • Average September

    66.6 °F

  • Highest 9 September, 2026

    100.4 °F

Climate (2021–2026)

Novato / Gnoss Field (12.4 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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