Milliken Reservoir Weather Forecast

    • 49
    • 70

    Mostly Sunny

    • 52
    • 72

    Mostly Sunny

    • 53
    • 76

    Mostly Sunny

    • 56
    • 77

    Mostly Sunny

    • 61
    • 85

    Partly Sunny

    • 57
    • 84

    Mostly Sunny

Today 7 May North Bay Interior Mountains

Sunny. Highs in the 60s to 70s. Southwest Winds 5 to 10 Mph.

Tonight 7 May North Bay Interior Mountains

Mostly clear in the evening then becoming partly cloudy. Lows in the lower 50s. West Winds 5 to 10 Mph.

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  • Temperature Real-Time

Milliken Reservoir Temperature Statistics

May Temperature

Napa, Napa County Airport (11.8 miles)

  • Lowest 4 May, 2026

    46.9 °F

  • Average May

    57.9 °F

  • Highest 1 May, 2026

    66.7 °F

Climate (2021–Present)

Napa, Napa County Airport (11.8 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    58.3 °F

  • Average High 2021–2026

    70.2 °F
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