Napa River - Mud Slough Entrance Weather Forecast

    • 57
    • 72

    Increasing Clouds

    • 58
    • 70

    Mostly Cloudy

    • 57
    • 64

    Mostly Cloudy

    • 56
    • 66

    Partly Sunny

    • 56
    • 68

    Partly Sunny

    • 57
    • 70

    Mostly Cloudy

    • 57
    • 71

    Mostly Cloudy

Today 11 Aug North Bay Interior Valleys

Sunny. Highs in the lower 70s to mid 80s. Southwest Winds 10 to 15 Mph.

Tonight 11 Aug North Bay Interior Valleys

Mostly clear in the evening then becoming mostly cloudy. Patchy fog in the evening. Areas of fog after midnight. Lows in the 40s to upper 50s. Southwest Winds 5 to 15 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Napa River - Mud Slough Entrance Temperature Statistics

August Temperature

Napa, Napa County Airport (1.9 miles)

  • Lowest 6 August, 2026

    51.7 °F

  • Average August

    67.3 °F

  • Highest 2 August, 2026

    86.6 °F

Climate (2021–2026)

Napa, Napa County Airport (1.9 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