Milliken Reservoir Weather Forecast

    • 66
    • 83

    Sunny

    • 62
    • 86

    Mostly Sunny

    • 59
    • 75

    Mostly Cloudy

    • 57
    • 69

    Slight Chance Rain Showers

    • 58
    • 75

    Mostly Sunny

    • 62
    • 79

    Mostly Sunny

Today 16 Sep North Bay Interior Mountains

Sunny. Highs in the 80s to lower 90s. East Winds around 5 Mph. Becoming southwest in the afternoon.

Tonight 16 Sep North Bay Interior Mountains

Clear. Lows in the upper 60s. West Winds around 5 Mph in the evening. Becoming light.

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 14 September, 2025

    48 °F

  • Average September

    65.7 °F

  • Highest 1 September, 2025

    89.1 °F

Climate (2020–Present)

Napa, Napa County Airport (11.8 miles)

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

  • Average Low 2020–2025

    46.9 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    70.5 °F
Get WillyWeather+ to remove ads