Second Napa Slough Weather Forecast

    • 49
    • 70

    Areas Fog

    • 49
    • 74

    Becoming Sunny

    • 52
    • 74

    Areas Fog

    • 52
    • 76

    Mostly Sunny

    • 51
    • 71

    Partly Sunny

    • 54
    • 69

    Mostly Cloudy

    • 54
    • 65

    Rain Likely

Today 30 Oct North Bay Interior Valleys

Partly cloudy. Highs in the 60s to 70s. Southwest Winds 10 to 15 Mph.

Tonight 30 Oct North Bay Interior Valleys

Partly cloudy in the evening then becoming mostly clear. Patchy fog after midnight. Lows in the 40s to mid 50s. West Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Second Napa Slough Temperature Statistics

October Temperature

Napa, Napa County Airport (6.8 miles)

  • Lowest 12 October, 2025

    42.1 °F

  • Average October

    59.9 °F

  • Highest 7 October, 2025

    88 °F

Climate (2020–Present)

Napa, Napa County Airport (6.8 miles)

Take a look at our website widgetsAvailable free! Find Out More

  • Average Low 2020–2025

    46.9 °F

  • Average 2020–2025

    58 °F

  • Average High 2020–2025

    70.3 °F
Get WillyWeather+ to remove ads