Rockville Weather Forecast

    • 51
    • 81

    Partly Sunny

    • 48
    • 76

    Mostly Sunny

    • 52
    • 74

    Partly Sunny

    • 55
    • 74

    Partly Sunny

    • 53
    • 71

    Chance Rain

    • 52
    • 70

    Chance Rain

    • 49
    • 70

    Mostly Sunny

Today 5 Apr Carquinez Strait and Delta

Partly cloudy in the morning then clearing. Highs around 82. Light Winds.

Tonight 5 Apr Carquinez Strait and Delta

Partly cloudy. Lows around 51. West Winds up to 10 Mph.

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Rockville Temperature Statistics

April Temperature

Napa, Napa County Airport (8.7 miles)

  • Lowest 2 April, 2026

    43.6 °F

  • Average April

    59.3 °F

  • Highest 3 April, 2026

    75.9 °F

Climate (2021–Present)

Napa, Napa County Airport (8.7 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    58.3 °F

  • Average High 2021–2026

    70.2 °F
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