Milliken Reservoir Weather Forecast

    • 55
    • 81

    Mostly Sunny

    • 58
    • 85

    Sunny

    • 63
    • 87

    Sunny

    • 61
    • 88

    Sunny

    • 60
    • 88

    Sunny

    • 57
    • 84

    Mostly Sunny

Today 30 Jul North Bay Interior Mountains

Sunny. Highs in the upper 70s to lower 90s. West Winds 5 to 10 Mph.

Tonight 30 Jul North Bay Interior Mountains

Clear. Lows in the upper 50s to mid 60s. Northwest Winds up to 5 Mph.

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Milliken Reservoir Temperature Statistics

July Temperature

Napa, Napa County Airport (11.8 miles)

  • Lowest 11 July, 2026

    48.7 °F

  • Average July

    67 °F

  • Highest 13 July, 2026

    89.7 °F

Climate (2021–2026)

Napa, Napa County Airport (11.8 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    58.5 °F

  • Average High 2021–2026

    70.3 °F
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