Napa County Regional Park District - Lake Hennessey City Recreation Area Weather Forecast

    • 52
    • 57

    Rain

    • 48
    • 57

    Rain

    • 47
    • 54

    Rain

    • 43
    • 53

    Rain

    • 45
    • 52

    Rain

    • 42
    • 51

    Rain

    • 38
    • 52

    Rain Likely

Today 20 Dec North Bay Interior Valleys

Patchy fog. Rain. Highs in the mid 50s to lower 60s. Southeast Winds around 5 Mph.

Tonight 20 Dec North Bay Interior Valleys

Rain. Lows in the lower to mid 50s. South Winds 10 to 20 Mph with Gusts to around 35 Mph.

Graph Plots Open in Graphs

  • Temperature Forecast NOAA

  • Temperature Real-Time

Napa County Regional Park District - Lake Hennessey City Recreation Area Temperature Statistics

December Temperature

Napa, Napa County Airport (19.9 miles)

  • Lowest 2 December, 2025

    37 °F

  • Average December

    45.5 °F

  • Highest 3 December, 2025

    66 °F

Climate (2020–Present)

Napa, Napa County Airport (19.9 miles)

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

  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    70.1 °F
Get WillyWeather+ to remove ads