San Geronimo Weather Forecast

    • 40
    • 56

    Partly Sunny

    • 41
    • 54

    Mostly Sunny

    • 42
    • 57

    Mostly Sunny

    • 44
    • 58

    Mostly Sunny

    • 45
    • 59

    Mostly Sunny

    • 45
    • 60

    Mostly Sunny

Today 11 Jan Marin Coastal Range

Partly cloudy. Highs in the mid 50s. East Winds 5 to 10 Mph. Becoming northeast in the afternoon.

Tonight 11 Jan Marin Coastal Range

Partly cloudy in the evening then becoming mostly clear. Lows around 40. North Winds around 5 Mph.

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San Geronimo Temperature Statistics

January Temperature

Novato / Gnoss Field (10.6 miles)

  • Lowest 8 January, 2026

    44.6 °F

  • Average January

    53.7 °F

  • Highest 3 January, 2026

    62.6 °F

Climate (2021–Present)

Novato / Gnoss Field (10.6 miles)

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  • Average Low 2021–2026

    46.3 °F

  • Average 2021–2026

    57.4 °F

  • Average High 2021–2026

    72.3 °F
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