Milliken Reservoir Weather Forecast

    • 57
    • 85

    Becoming Sunny

    • 54
    • 76

    Mostly Sunny

    • 51
    • 70

    Mostly Sunny

    • 54
    • 73

    Mostly Sunny

    • 51
    • 75

    Mostly Sunny

    • 49
    • 68

    Mostly Sunny

Today 10 Sep North Bay Interior Mountains

Partly cloudy in the morning then becoming sunny. Highs in the 80s to mid 90s. West Winds 5 to 10 Mph.

Tonight 10 Sep North Bay Interior Mountains

Mostly clear. Lows in the upper 50s to mid 60s. West Winds 5 to 10 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Milliken Reservoir Temperature Statistics

September Temperature

Napa, Napa County Airport (11.8 miles)

  • Lowest 6 September, 2026

    45.6 °F

  • Average September

    65.7 °F

  • Highest 8 September, 2026

    93 °F

Climate (2021–2026)

Napa, Napa County Airport (11.8 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