Second Napa Slough Weather Forecast

    • 50
    • 76

    Mostly Sunny

    • 58
    • 78

    Mostly Sunny

    • 52
    • 84

    Sunny

    • 52
    • 87

    Sunny

    • 51
    • 83

    Mostly Sunny

    • 50
    • 80

    Mostly Sunny

    • 50
    • 73

    Mostly Sunny

Today 16 May North Bay Interior Valleys

Sunny. Highs in the upper 60s to lower 80s. Northwest Winds 10 to 20 Mph with Gusts to around 35 Mph.

Tonight 16 May North Bay Interior Valleys

Mostly clear. Lows in the upper 40s to mid 50s. Northwest Winds 10 to 20 Mph with Gusts to around 40 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Second Napa Slough Temperature Statistics

May Temperature

Napa, Napa County Airport (6.8 miles)

  • Lowest 4 May, 2026

    46.7 °F

  • Average May

    61 °F

  • Highest 11 May, 2026

    79.6 °F

Climate (2021–Present)

Napa, Napa County Airport (6.8 miles)

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

  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    58.3 °F

  • Average High 2021–2026

    70.2 °F
Get WillyWeather+ to remove ads