Lake Hennessey Weather Forecast

    • 46
    • 83

    Increasing Clouds

    • 50
    • 83

    Mostly Sunny

    • 55
    • 88

    Mostly Sunny

    • 52
    • 93

    Mostly Sunny

    • 49
    • 84

    Sunny

    • 49
    • 80

    Sunny

Today 15 Jun North Bay Interior Valleys

Sunny. Highs in the upper 60s to lower 80s. Southwest Winds 10 to 20 Mph.

Tonight 15 Jun North Bay Interior Valleys

Partly cloudy. Lows in the mid 40s to lower 50s. West Winds 10 to 20 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Lake Hennessey Temperature Statistics

June Temperature

Napa, Napa County Airport (19.9 miles)

  • Lowest 12 June, 2025

    44.1 °F

  • Average June

    62.2 °F

  • Highest 2 June, 2025

    76.6 °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

    70.6 °F
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