Napa River - Mud Slough Entrance Weather Forecast

    • 51
    • 76

    Increasing Clouds

    • 53
    • 71

    Decreasing Clouds

    • 50
    • 73

    Mostly Sunny

    • 52
    • 81

    Sunny

    • 52
    • 82

    Mostly Sunny

    • 52
    • 80

    Mostly Sunny

    • 55
    • 83

    Mostly Sunny

Today 11 May North Bay Interior Valleys

Partly cloudy. Highs in the lower 70s to mid 80s. Southwest Winds 5 to 10 Mph.

Tonight 11 May North Bay Interior Valleys

Partly cloudy in the evening then becoming mostly cloudy. Areas of fog after midnight. Lows in the upper 40s to lower 60s. Southwest Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Napa River - Mud Slough Entrance Temperature Statistics

May Temperature

Napa, Napa County Airport (1.9 miles)

  • Lowest 4 May, 2026

    46.7 °F

  • Average May

    60 °F

  • Highest 6 May, 2026

    74.6 °F

Climate (2021–Present)

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

    58.3 °F

  • Average High 2021–2026

    70.2 °F
Get WillyWeather+ to remove ads