Napa River - Steamboat Slough Entrance Weather Forecast

    • 43
    • 63

    Increasing Clouds

    • 43
    • 60

    Areas Fog

    • 42
    • 61

    Partly Sunny

    • 41
    • 62

    Partly Sunny

    • 42
    • 61

    Partly Sunny

    • 46
    • 63

    Patchy Fog

Today 22 Nov North Bay Interior Valleys

Sunny. Patchy fog in the morning. Highs in the 50s to upper 60s. Northeast Winds around 5 Mph. Becoming west up to 5 Mph in the afternoon.

Tonight 22 Nov North Bay Interior Valleys

Mostly clear in the evening then becoming partly cloudy. Patchy fog in the evening. Areas of fog after midnight. Lows in the 40s to lower 50s. Northwest Winds up to 5 Mph in the evening. Becoming light.

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Napa River - Steamboat Slough Entrance Temperature Statistics

November Temperature

Napa, Napa County Airport (1.9 miles)

  • Lowest 18 November, 2025

    43 °F

  • Average November

    57.7 °F

  • Highest 10 November, 2025

    79 °F

Climate (2020–Present)

Napa, Napa County Airport (1.9 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    70.3 °F
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