Milliken Reservoir Weather Forecast

    • 50
    • 72

    Mostly Sunny

    • 49
    • 75

    Mostly Sunny

    • 50
    • 72

    Mostly Sunny

    • 50
    • 71

    Mostly Sunny

    • 57
    • 77

    Sunny

    • 57
    • 86

    Sunny

    • 53
    • 83

    Sunny

Today 5 Jul North Bay Interior Mountains

Sunny. Highs in the lower 70s to mid 80s. Southwest Winds 5 to 10 Mph.

Tonight 5 Jul North Bay Interior Mountains

Clear. Lows in the 50s to lower 60s. West Winds 5 to 10 Mph. Becoming north after midnight.

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Milliken Reservoir Temperature Statistics

July Temperature

Napa, Napa County Airport (11.8 miles)

  • Lowest 3 July, 2025

    51.1 °F

  • Average July

    61.1 °F

  • Highest 1 July, 2025

    72 °F

Climate (2020–Present)

Napa, Napa County Airport (11.8 miles)

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  • Average Low 2020–2025

    46.9 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    70.6 °F
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