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

    • 46
    • 67

    Increasing Clouds

    • 44
    • 68

    Mostly Sunny

    • 43
    • 66

    Sunny

    • 43
    • 65

    Mostly Sunny

    • 43
    • 64

    Partly Sunny

    • 43
    • 61

    Patchy Fog

Today 17 Jan North Bay Interior Valleys

Sunny in the morning then becoming partly cloudy. Patchy fog in the morning. Highs in the upper 50s to lower 70s. East Winds 5 to 10 Mph.

Tonight 17 Jan North Bay Interior Valleys

Mostly cloudy. Patchy dense fog after midnight. Lows in the upper 30s to lower 50s. Northeast Winds up to 5 Mph.

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

January Temperature

Napa, Napa County Airport (19.9 miles)

  • Lowest 9 January, 2026

    32 °F

  • Average January

    49.7 °F

  • Highest 15 January, 2026

    62.1 °F

Climate (2021–Present)

Napa, Napa County Airport (19.9 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    70.1 °F
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