Napa Weather Forecast

    • 55
    • 87

    Sunny

    • 54
    • 89

    Mostly Sunny

    • 52
    • 87

    Mostly Sunny

    • 50
    • 87

    Mostly Sunny

    • 49
    • 79

    Mostly Sunny

    • 49
    • 76

    Mostly Sunny

Today 18 May North Bay Interior Valleys

Sunny, breezy. Highs in the mid 70s to upper 80s. North Winds 20 to 30 Mph decreasing to 10 to 20 Mph in the afternoon.

Tonight 18 May North Bay Interior Valleys

Clear. Lows in the 50s to lower 60s. Northwest Winds 5 to 10 Mph. Gusts up to 25 Mph in the evening.

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Napa Temperature Statistics

May Temperature

Napa, Napa County Airport (6.2 miles)

  • Lowest 14 May, 2026

    45.6 °F

  • Average May

    61.2 °F

  • Highest 15 May, 2026

    80.7 °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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