San Anselmo Weather Forecast

    • 51
    • 58

    Rain

    • 49
    • 58

    Rain

    • 51
    • 57

    Rain

    • 47
    • 55

    Rain

    • 42
    • 54

    Rain Likely

    • 40
    • 54

    Partly Sunny

Today 22 Dec North Bay Interior Valleys

Areas of fog. Rain. Highs in the 50s. West Winds 5 to 10 Mph.

Tonight 22 Dec North Bay Interior Valleys

Areas of fog. Rain. Lows in the upper 40s to mid 50s. North Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

San Anselmo Temperature Statistics

December Temperature

Novato / Gnoss Field (11.2 miles)

  • Lowest 2 December, 2025

    37.4 °F

  • Average December

    47.7 °F

  • Highest 3 December, 2025

    71.6 °F

Climate (2020–Present)

Novato / Gnoss Field (11.2 miles)

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  • Average Low 2020–2025

    46.2 °F

  • Average 2020–2025

    57.4 °F

  • Average High 2020–2025

    72.3 °F
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