Milliken Reservoir Weather Forecast

    • 42
    • 59

    Partly Sunny

    • 43
    • 55

    Mostly Sunny

    • 39
    • 55

    Mostly Sunny

    • 40
    • 51

    Mostly Cloudy

    • 40
    • 53

    Partly Sunny

    • 45
    • 53

    Mostly Cloudy

Today 22 Jan North Bay Interior Mountains

Mostly cloudy in the morning then becoming partly cloudy. Highs in the mid 50s to lower 60s. West Winds around 5 Mph.

Tonight 22 Jan North Bay Interior Mountains

Mostly cloudy. Lows in the upper 40s. North Winds around 5 Mph.

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Milliken Reservoir Temperature Statistics

January Temperature

Napa, Napa County Airport (11.8 miles)

  • Lowest 9 January, 2026

    32 °F

  • Average January

    49.2 °F

  • Highest 15 January, 2026

    62.1 °F

Climate (2021–Present)

Napa, Napa County Airport (11.8 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    70 °F
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