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

    • 50
    • 56

    Rain

    • 50
    • 54

    Rain

    • 51
    • 57

    Rain

    • 47
    • 55

    Rain

    • 42
    • 52

    Rain

    • 44
    • 51

    Rain

    • 43
    • 52

    Rain

Today 19 Dec North Bay Interior Valleys

Rain. Highs in the mid to upper 50s. South Winds 10 to 20 Mph.

Tonight 19 Dec North Bay Interior Valleys

Patchy fog. Rain in the evening. A chance of rain after midnight. Lows in the upper 40s to mid 50s. Southwest Winds 5 to 15 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

    45.1 °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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