Lake Hennessey Weather Forecast

    • 51
    • 77

    Mostly Sunny

    • 53
    • 77

    Sunny

    • 49
    • 78

    Mostly Sunny

    • 51
    • 71

    Mostly Cloudy

    • 53
    • 68

    Rain Likely

    • 52
    • 61

    Rain

    • 49
    • 66

    Partly Sunny

Today 31 Oct North Bay Interior Valleys

Sunny. Highs in the upper 60s to lower 80s. West Winds 5 to 10 Mph.

Tonight 31 Oct North Bay Interior Valleys

Partly cloudy in the evening then becoming mostly clear. Patchy fog after midnight. Lows in the 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 12 October, 2025

    42.1 °F

  • Average October

    60 °F

  • Highest 7 October, 2025

    88 °F

Climate (2020–Present)

Napa, Napa County Airport (19.9 miles)

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  • Average Low 2020–2025

    46.9 °F

  • Average 2020–2025

    58 °F

  • Average High 2020–2025

    70.3 °F
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