Trancas Crossing Park Weather Forecast

    • 51
    • 84

    Mostly Sunny

    • 50
    • 79

    Mostly Sunny

    • 49
    • 75

    Partly Sunny

    • 48
    • 75

    Mostly Sunny

    • 49
    • 75

    Partly Sunny

    • 50
    • 75

    Mostly Sunny

Today 21 May North Bay Interior Valleys

Sunny. Highs in the lower 70s to mid 80s. South Winds up to 5 Mph increasing to southwest 10 to 15 Mph in the afternoon.

Tonight 21 May North Bay Interior Valleys

Mostly clear except patchy fog after midnight. Lows in the mid 40s to lower 60s. Southwest Winds 5 to 15 Mph.

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Trancas Crossing Park Temperature Statistics

May Temperature

Napa, Napa County Airport (8.1 miles)

  • Lowest 14 May, 2026

    45.6 °F

  • Average May

    62.4 °F

  • Highest 19 May, 2026

    88 °F

Climate (2021–Present)

Napa, Napa County Airport (8.1 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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