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

    • 52
    • 61

    Rain

    • 44
    • 61

    Rain Likely

    • 48
    • 59

    Chance Rain

    • 51
    • 57

    Rain

    • 49
    • 58

    Rain Likely

    • 51
    • 56

    Rain

Today 16 Dec North Bay Interior Valleys

Cloudy. Patchy fog. A chance of rain. Highs in the 50s to lower 60s. Southeast Winds up to 5 Mph. Becoming southwest around 5 Mph in the afternoon.

Tonight 16 Dec North Bay Interior Valleys

Patchy dense fog. Rain. Lows in the lower to mid 50s. Southwest Winds 5 to 10 Mph.

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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

    44.5 °F

  • Highest 3 December, 2025

    66 °F

Climate (2020–Present)

Napa, Napa County Airport (19.9 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    58 °F

  • Average High 2020–2025

    70.1 °F
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