Mare Island Shoreline Heritage Preserve Weather Forecast

    • 45
    • 56

    Increasing Clouds

    • 48
    • 59

    Mostly Cloudy

    • 47
    • 58

    Partly Sunny

    • 45
    • 58

    Partly Sunny

    • 46
    • 57

    Mostly Sunny

    • 45
    • 60

    Mostly Sunny

Today 26 Nov Carquinez Strait and Delta

Mostly cloudy in the morning then becoming partly cloudy. Areas of fog. Locally dense in the morning. Highs 55 to 61. Northeast Winds up to 10 Mph.

Tonight 26 Nov Carquinez Strait and Delta

Partly cloudy. Lows 39 to 45. Light Winds.

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Mare Island Shoreline Heritage Preserve Temperature Statistics

November Temperature

Napa, Napa County Airport (8.7 miles)

  • Lowest 22 November, 2025

    39 °F

  • Average November

    56.6 °F

  • Highest 10 November, 2025

    79 °F

Climate (2020–Present)

Napa, Napa County Airport (8.7 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    70.2 °F
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