Rockville Hills Regional Park Weather Forecast

    • 57
    • 80

    Sunny

    • 54
    • 85

    Sunny

    • 53
    • 82

    Sunny

    • 56
    • 86

    Sunny

    • 52
    • 83

    Mostly Sunny

    • 52
    • 78

    Mostly Sunny

    • 52
    • 79

    Sunny

Today 18 May Carquinez Strait and Delta

Sunny, warmer. Highs 78 to 84. Northwest Winds 10 to 20 Mph.

Tonight 18 May Carquinez Strait and Delta

Clear. Lows 55 to 61. West Winds 10 to 15 Mph with Gusts to around 25 Mph.

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Rockville Hills Regional Park Temperature Statistics

May Temperature

Napa, Napa County Airport (7.5 miles)

  • Lowest 4 May, 2025

    42.7 °F

  • Average May

    60.5 °F

  • Highest 9 May, 2025

    87.7 °F

Climate (2020–Present)

Napa, Napa County Airport (7.5 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    58.2 °F

  • Average High 2020–2025

    70.7 °F
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