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

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    Rain

    • 48
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    Rain

    • 47
    • 54

    Rain

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    Rain

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    Rain

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    Rain

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    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.

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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

    45.5 °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

    58.1 °F
  • Average High 2020–2025

    70.1 °F
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