Carquinez Strait - Mare Island Strait Entrance Weather Forecast

    • 55
    • 68

    Increasing Clouds

    • 55
    • 68

    Partly Sunny

    • 57
    • 67

    Mostly Cloudy

    • 58
    • 67

    Mostly Cloudy

    • 58
    • 71

    Partly Sunny

    • 57
    • 71

    Partly Sunny

Today 17 Jul Southwestern Solano County Including Vallejo

Sunny. Highs 72 to 82. Southwest Winds 10 to 15 Mph with Gusts to around 25 Mph.

Tonight 17 Jul Southwestern Solano County Including Vallejo

Mostly clear. Lows around 56. Southwest Winds 10 to 15 Mph with Gusts to around 25 Mph.

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Carquinez Strait - Mare Island Strait Entrance Temperature Statistics

July Temperature

Napa, Napa County Airport (9.3 miles)

  • Lowest 11 July, 2026

    48.7 °F

  • Average July

    65.4 °F

  • Highest 13 July, 2026

    88 °F

Climate (2021–2026)

Napa, Napa County Airport (9.3 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    58.4 °F

  • Average High 2021–2026

    70.2 °F
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