Carquinez Strait - Selby Weather Forecast

    • 67
    • 93

    Partly Sunny

    • 60
    • 83

    Mostly Sunny

    • 58
    • 75

    Mostly Sunny

    • 57
    • 73

    Mostly Sunny

    • 57
    • 76

    Mostly Sunny

    • 57
    • 74

    Mostly Sunny

Today 9 Sep East Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Highs 99 to 104. Northwest Winds 5 to 10 Mph.

Tonight 9 Sep East Bay Interior Valleys

Mostly clear. Lows in the lower 70s. West Winds 5 to 10 Mph.

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Carquinez Strait - Selby Temperature Statistics

September Temperature

Napa, Napa County Airport (10.6 miles)

  • Lowest 6 September, 2026

    46 °F

  • Average September

    63.8 °F

  • Highest 5 September, 2026

    79.6 °F

Climate (2021–2026)

Napa, Napa County Airport (10.6 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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