Napa River - Napa Weather Forecast

    • 56
    • 75

    Increasing Clouds

    • 55
    • 68

    Mostly Cloudy

    • 54
    • 68

    Mostly Cloudy

    • 53
    • 72

    Partly Sunny

    • 54
    • 74

    Mostly Cloudy

    • 54
    • 75

    Mostly Cloudy

Today 12 Aug North Bay Interior Valleys

Mostly cloudy late in the morning then becoming partly cloudy. Highs in the upper 60s to lower 80s. South Winds 5 to 15 Mph.

Tonight 12 Aug North Bay Interior Valleys

Mostly cloudy. Patchy fog. Lows in the 50s. South Winds 10 to 15 Mph.

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Napa River - Napa Temperature Statistics

August Temperature

Napa, Napa County Airport (5.6 miles)

  • Lowest 6 August, 2026

    51.7 °F

  • Average August

    67.2 °F

  • Highest 2 August, 2026

    86.6 °F

Climate (2021–2026)

Napa, Napa County Airport (5.6 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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