Nicasio Reservoir Weather Forecast

    • 51
    • 81

    Mostly Sunny

    • 49
    • 79

    Mostly Sunny

    • 49
    • 77

    Mostly Sunny

    • 50
    • 69

    Partly Sunny

    • 50
    • 65

    Areas Fog

    • 48
    • 66

    Patchy Fog

    • 48
    • 66

    Mostly Sunny

Today 19 May Marin Coastal Range

Sunny. Highs around 80. West Winds around 10 Mph.

Tonight 19 May Marin Coastal Range

Mostly clear. Lows in the mid 50s. Northwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Nicasio Reservoir Temperature Statistics

May Temperature

Novato / Gnoss Field (10.6 miles)

  • Lowest 4 May, 2026

    46.4 °F

  • Average May

    60.8 °F

  • Highest 11 May, 2026

    86 °F

Climate (2021–Present)

Novato / Gnoss Field (10.6 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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