Lake Hennessey Weather Forecast

    • 47
    • 65

    Chance Rain Showers

    • 48
    • 70

    Becoming Sunny

    • 44
    • 75

    Sunny

    • 45
    • 74

    Mostly Sunny

    • 44
    • 72

    Partly Sunny

    • 45
    • 71

    Partly Sunny

    • 45
    • 71

    Partly Sunny

Today 22 Oct North Bay Interior Valleys

Mostly cloudy in the morning then becoming partly cloudy. Highs in the 60s to lower 70s.

Tonight 22 Oct North Bay Interior Valleys

Mostly cloudy in the evening then becoming partly cloudy. Patchy fog. Lows in the lower 40s to mid 50s. West Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Hennessey Temperature Statistics

October Temperature

Napa, Napa County Airport (19.9 miles)

  • Lowest 13 October, 2026

    38.6 °F

  • Average October

    64.9 °F

  • Highest 3 October, 2026

    96.7 °F

Climate (2021–2026)

Napa, Napa County Airport (19.9 miles)

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  • Average Low 2021–2026

    47.4 °F

  • Average 2021–2026

    58.6 °F

  • Average High 2021–2026

    70.4 °F
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