Napa River - White Slough Entrance Weather Forecast

    • 58
    • 70

    Increasing Clouds

    • 59
    • 69

    Mostly Cloudy

    • 58
    • 69

    Partly Sunny

    • 58
    • 74

    Mostly Sunny

    • 57
    • 75

    Partly Sunny

    • 57
    • 71

    Partly Sunny

Today 19 Aug Southwestern Solano County Including Vallejo

Haze and patchy fog early in the morning. Mostly sunny. Highs 78 to 88. Southwest Winds 10 to 15 Mph.

Tonight 19 Aug Southwestern Solano County Including Vallejo

Mostly clear. Lows around 59. Southwest Winds 10 to 15 Mph with Gusts to around 25 Mph.

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Napa River - White Slough Entrance Temperature Statistics

August Temperature

Napa, Napa County Airport (5 miles)

  • Lowest 6 August, 2026

    51.7 °F

  • Average August

    66.2 °F

  • Highest 2 August, 2026

    86.6 °F

Climate (2021–2026)

Napa, Napa County Airport (5 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    58.5 °F

  • Average High 2021–2026

    70.3 °F
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