Napa River - Fagan Slough Entrance Weather Forecast

    • 49
    • 78

    Decreasing Clouds

    • 49
    • 78

    Mostly Sunny

    • 49
    • 80

    Mostly Sunny

    • 47
    • 79

    Partly Sunny

    • 50
    • 78

    Partly Sunny

    • 50
    • 80

    Mostly Cloudy

Today 22 Mar North Bay Interior Valleys

Partly cloudy in the morning then becoming sunny. Highs in the 70s to lower 80s. West Winds 5 to 10 Mph.

Tonight 22 Mar North Bay Interior Valleys

Partly cloudy. Lows in the mid 40s to upper 50s. West Winds 5 to 10 Mph.

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Napa River - Fagan Slough Entrance Temperature Statistics

March Temperature

Napa, Napa County Airport (1.2 miles)

  • Lowest 5 March, 2026

    37.7 °F

  • Average March

    60.4 °F

  • Highest 20 March, 2026

    87.1 °F

Climate (2021–Present)

Napa, Napa County Airport (1.2 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    58.3 °F

  • Average High 2021–2026

    70.2 °F
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