Nicasio Weather Forecast

    • 50
    • 59

    Mostly Cloudy

    • 49
    • 57

    Rain

    • 50
    • 57

    Rain Showers

    • 50
    • 58

    Rain

    • 45
    • 57

    Rain Likely

    • 46
    • 54

    Rain

Today 18 Dec Marin Coastal Range

Mostly cloudy. Patchy fog in the morning. A chance of rain in the afternoon. Highs in the mid 50s. Light Winds becoming west around 5 Mph in the afternoon.

Tonight 18 Dec Marin Coastal Range

A chance of rain in the Evening, then rain likely after midnight. Lows around 50. Southwest Winds 5 to 10 Mph.

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  • Temperature Real-Time

Nicasio Temperature Statistics

December Temperature

Novato / Gnoss Field (9.3 miles)

  • Lowest 2 December, 2025

    37.4 °F

  • Average December

    45.7 °F

  • Highest 3 December, 2025

    71.6 °F

Climate (2020–Present)

Novato / Gnoss Field (9.3 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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