Green Valley Lake Park Weather Forecast

    • 52
    • 84

    Becoming Sunny

    • 51
    • 82

    Mostly Sunny

    • 54
    • 84

    Mostly Sunny

    • 53
    • 82

    Mostly Sunny

    • 53
    • 80

    Mostly Sunny

    • 55
    • 80

    Partly Sunny

Today 21 Mar Carquinez Strait and Delta

Partly cloudy. Highs 83 to 89. West Winds up to 10 Mph with Gusts to around 20 Mph.

Tonight 21 Mar Carquinez Strait and Delta

Mostly clear. Lows around 53. West Winds 10 to 15 Mph.

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Green Valley Lake Park Temperature Statistics

March Temperature

Napa, Napa County Airport (7.5 miles)

  • Lowest 5 March, 2026

    37.7 °F

  • Average March

    59.1 °F

  • Highest 18 March, 2026

    84.9 °F

Climate (2021–Present)

Napa, Napa County Airport (7.5 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    58.2 °F

  • Average High 2021–2026

    70.2 °F
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