San Anselmo Weather Forecast

    • 53
    • 89

    Sunny

    • 51
    • 82

    Mostly Sunny

    • 50
    • 81

    Mostly Sunny

    • 51
    • 68

    Partly Sunny

    • 51
    • 67

    Partly Sunny

    • 51
    • 69

    Mostly Sunny

Today 19 May North Bay Interior Valleys

Sunny. Highs in the upper 70s to lower 90s. North Winds 5 to 15 Mph.

Tonight 19 May North Bay Interior Valleys

Mostly clear. Lows in the upper 40s to mid 60s. West Winds 10 to 15 Mph decreasing to up to 5 Mph after midnight.

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San Anselmo Temperature Statistics

May Temperature

Novato / Gnoss Field (11.2 miles)

  • Lowest 4 May, 2026

    46.4 °F

  • Average May

    60.5 °F

  • Highest 11 May, 2026

    86 °F

Climate (2021–Present)

Novato / Gnoss Field (11.2 miles)

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  • Average Low 2021–2026

    46.7 °F

  • Average 2021–2026

    57.7 °F

  • Average High 2021–2026

    72.5 °F
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