Trancas Crossing Park Weather Forecast

    • 56
    • 81

    Mostly Cloudy

    • 54
    • 80

    Mostly Cloudy

    • 55
    • 81

    Partly Sunny

    • 56
    • 82

    Partly Sunny

    • 55
    • 79

    Partly Sunny

    • 55
    • 80

    Partly Sunny

Today 20 Aug North Bay Interior Valleys

Mostly cloudy in the morning then becoming partly cloudy. Patchy fog in the morning. Highs in the lower 70s to mid 80s. Southwest Winds 5 to 15 Mph.

Tonight 20 Aug North Bay Interior Valleys

Mostly cloudy. Lows in the 50s to lower 60s. Southwest Winds 5 to 15 Mph.

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Trancas Crossing Park Temperature Statistics

August Temperature

Napa, Napa County Airport (8.1 miles)

  • Lowest 6 August, 2026

    51.7 °F

  • Average August

    66.2 °F

  • Highest 2 August, 2026

    86.6 °F

Climate (2021–2026)

Napa, Napa County Airport (8.1 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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