Napa River - Napa Weather Forecast

    • 62
    • 87

    Mostly Sunny

    • 59
    • 80

    Partly Sunny

    • 54
    • 72

    Partly Sunny

    • 52
    • 75

    Mostly Sunny

    • 55
    • 79

    Mostly Sunny

    • 58
    • 85

    Mostly Sunny

Today 15 Aug North Bay Interior Valleys

Sunny, breezy. Highs in the upper 70s to lower 90s. West Winds 10 to 20 Mph increasing to 20 to 30 Mph in the afternoon.

Tonight 15 Aug North Bay Interior Valleys

Mostly clear. Breezy. Lows in the upper 50s to mid 60s. West Winds 20 to 30 Mph.

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Napa River - Napa Temperature Statistics

August Temperature

Napa, Napa County Airport (5.6 miles)

  • Lowest 3 August, 2025

    50.6 °F

  • Average August

    66.4 °F

  • Highest 6 August, 2025

    88.6 °F

Climate (2020–Present)

Napa, Napa County Airport (5.6 miles)

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  • Average Low 2020–2025

    46.9 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    70.5 °F
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