Napa River - North Slough Entrance Weather Forecast

    • 57
    • 63

    Increasing Clouds

    • 57
    • 61

    Partly Sunny

    • 57
    • 63

    Partly Sunny

    • 55
    • 67

    Partly Sunny

    • 52
    • 70

    Partly Sunny

    • 54
    • 72

    Mostly Sunny

Today 31 Aug North Bay Interior Valleys

Mostly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the mid 60s to lower 80s. Southwest Winds 10 to 20 Mph.

Tonight 31 Aug North Bay Interior Valleys

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

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Napa River - North Slough Entrance Temperature Statistics

August Temperature

Napa, Napa County Airport (2.5 miles)

  • Lowest 22 August, 2026

    50.6 °F

  • Average August

    66.6 °F

  • Highest 2 August, 2026

    86.6 °F

Climate (2021–2026)

Napa, Napa County Airport (2.5 miles)

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

  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    58.5 °F

  • Average High 2021–2026

    70.3 °F
Get WillyWeather+ to remove ads