Rockville Weather Forecast

    • 41
    • 46

    Decreasing Clouds

    • 41
    • 46

    Partly Sunny

    • 40
    • 46

    Partly Sunny

    • 42
    • 47

    Mostly Cloudy

    • 48
    • 58

    Chance Rain Showers

    • 51
    • 60

    Chance Rain Showers

    • 48
    • 57

    Slight Chance Rain Showers

Today 11 Dec Carquinez Strait and Delta

Areas of fog. Locally dense until late afternoon. Mostly cloudy. Highs around 47. Light Winds.

Tonight 11 Dec Carquinez Strait and Delta

Mostly cloudy. Patchy fog in the late evening and early morning. Widespread fog. Locally dense late in the night. Lows around 42. Light Winds.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Rockville Temperature Statistics

December Temperature

Napa, Napa County Airport (8.7 miles)

  • Lowest 2 December, 2025

    37 °F

  • Average December

    45.3 °F

  • Highest 3 December, 2025

    66 °F

Climate (2020–Present)

Napa, Napa County Airport (8.7 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    70.1 °F
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