Second Napa Slough Weather Forecast

    • 44
    • 61

    Rain

    • 37
    • 61

    Slight Chance Rain

    • 45
    • 60

    Rain Showers

    • 45
    • 58

    Rain Showers

    • 41
    • 57

    Rain

    • 40
    • 59

    Areas Fog

Today 15 Nov North Bay Interior Valleys

Rain. Highs in the mid 50s to lower 60s. Southeast Winds 10 to 20 Mph. Becoming west in the afternoon.

Tonight 15 Nov North Bay Interior Valleys

Mostly cloudy. Patchy fog. A chance of rain in the evening. A slight chance of rain after midnight. Lows in the 40s to lower 50s. West Winds up to 5 Mph. Becoming north after midnight.

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Second Napa Slough Temperature Statistics

November Temperature

Napa, Napa County Airport (6.8 miles)

  • Lowest 1 November, 2026

    40.6 °F

  • Average November

    56.9 °F

  • Highest 5 November, 2026

    75.7 °F

Climate (2021–2026)

Napa, Napa County Airport (6.8 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    58.6 °F

  • Average High 2021–2026

    70.4 °F
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