Napa Weather Forecast

    • 50
    • 80

    Increasing Clouds

    • 51
    • 75

    Partly Sunny

    • 49
    • 76

    Mostly Sunny

    • 51
    • 83

    Mostly Sunny

    • 51
    • 85

    Mostly Sunny

    • 52
    • 82

    Mostly Sunny

    • 55
    • 86

    Mostly Sunny

Today 11 May North Bay Interior Valleys

Partly cloudy. Highs in the lower 70s to mid 80s. South Winds 5 to 10 Mph.

Tonight 11 May North Bay Interior Valleys

Partly cloudy in the evening then becoming mostly cloudy. Areas of fog after midnight. Lows in the upper 40s to lower 60s. Southwest Winds 5 to 10 Mph.

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Napa Temperature Statistics

May Temperature

Napa, Napa County Airport (6.2 miles)

  • Lowest 4 May, 2026

    46.7 °F

  • Average May

    60 °F

  • Highest 6 May, 2026

    74.6 °F

Climate (2021–Present)

Napa, Napa County Airport (6.2 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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