Milliken Reservoir Weather Forecast

    • 48
    • 54

    Rain

    • 48
    • 51

    Rain Showers

    • 44
    • 50

    Rain

    • 41
    • 46

    Rain

    • 37
    • 48

    Mostly Sunny

    • 38
    • 48

    Partly Sunny

Today 23 Dec North Bay Interior Mountains

Rain. Highs in the mid 50s. South Winds 10 to 20 Mph with Gusts to around 35 Mph.

Tonight 23 Dec North Bay Interior Mountains

Breezy, rain. Lows in the upper 40s. Southeast Winds 10 to 20 Mph increasing to south 20 to 30 Mph after midnight. Gusts up to 50 Mph.

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  • Temperature Forecast NOAA

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Milliken Reservoir Temperature Statistics

December Temperature

Napa, Napa County Airport (11.8 miles)

  • Lowest 2 December, 2025

    37 °F

  • Average December

    46.7 °F

  • Highest 3 December, 2025

    66 °F

Climate (2020–Present)

Napa, Napa County Airport (11.8 miles)

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  • Average Low 2020–2025

    47.1 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    70.1 °F
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