Nicasio Reservoir Weather Forecast

    • 50
    • 59

    Rain Showers

    • 48
    • 55

    Rain Showers

    • 44
    • 56

    Rain Showers

    • 38
    • 55

    Slight Chance Rain Showers

    • 37
    • 55

    Mostly Sunny

    • 39
    • 55

    Mostly Sunny

Today 24 Dec Marin Coastal Range

Breezy. Showers and a slight chance of Thunderstorms. Some Thunderstorms may be severe with heavy rainfall. Highs in the mid 50s. South Winds 20 to 30 Mph becoming southeast 15 to 20 Mph in the afternoon.

Tonight 24 Dec Marin Coastal Range

Breezy. Showers and a slight chance of Thunderstorms. Some Thunderstorms may be severe with heavy rainfall. Lows in the upper 40s. South Winds 20 to 30 Mph with Gusts to around 50 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Nicasio Reservoir Temperature Statistics

December Temperature

Novato / Gnoss Field (10.6 miles)

  • Lowest 2 December, 2025

    37.4 °F

  • Average December

    48.3 °F

  • Highest 3 December, 2025

    71.6 °F

Climate (2020–Present)

Novato / Gnoss Field (10.6 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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