Dutchman Slough - Knight Island Weather Forecast

    • 59
    • 77

    Increasing Clouds

    • 60
    • 75

    Mostly Cloudy

    • 61
    • 79

    Partly Sunny

    • 59
    • 79

    Mostly Sunny

    • 58
    • 79

    Mostly Sunny

    • 56
    • 75

    Partly Sunny

Today 11 Jul Southwestern Solano County Including Vallejo

Partly cloudy in the morning then clearing. Highs 80 to 90. Southwest Winds 10 to 15 Mph.

Tonight 11 Jul Southwestern Solano County Including Vallejo

Mostly cloudy. Lows 58 to 63. Southwest Winds 10 to 15 Mph.

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Dutchman Slough - Knight Island Temperature Statistics

July Temperature

Napa, Napa County Airport (5.6 miles)

  • Lowest 3 July, 2026

    50.6 °F

  • Average July

    63.1 °F

  • Highest 3 July, 2026

    76.6 °F

Climate (2021–2026)

Napa, Napa County Airport (5.6 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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