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

    • 37
    • 56

    Decreasing Clouds

    • 37
    • 52

    Mostly Sunny

    • 35
    • 53

    Mostly Sunny

    • 38
    • 55

    Mostly Cloudy

    • 39
    • 58

    Partly Sunny

    • 42
    • 61

    Mostly Sunny

Today 7 Jan North Bay Interior Valleys

Mostly cloudy in the morning then becoming sunny. Highs in the 50s. Northwest Winds 5 to 15 Mph. Gusts up to 30 Mph in the afternoon.

Tonight 7 Jan North Bay Interior Valleys

Partly cloudy in the evening then becoming mostly clear. Lows in the 30s to mid 40s. Northwest Winds 10 to 20 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 1 January, 2026

    48.9 °F

  • Average January

    54.5 °F

  • Highest 2 January, 2026

    61 °F

Climate (2021–Present)

Napa, Napa County Airport (19.9 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    70.1 °F
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