Rockville Weather Forecast

    • 46
    • 53

    Rain

    • 46
    • 52

    Rain

    • 44
    • 53

    Chance Rain

    • 39
    • 53

    Chance Rain

    • 37
    • 51

    Mostly Sunny

    • 37
    • 51

    Mostly Sunny

    • 38
    • 52

    Partly Sunny

Today 4 Jan Carquinez Strait and Delta

Rain Showers and a slight chance of Thunderstorms early in the Morning, then rain in the late morning and afternoon. Highs around 54. South Winds 10 to 15 Mph with Gusts to around 25 Mph.

Tonight 4 Jan Carquinez Strait and Delta

Mostly cloudy. A chance of rain early in the Evening, then a slight chance of rain late in the evening. A chance of rain late in the night. Patchy fog late in the night. Lows around 47. South Winds 10 to 15 Mph.

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Rockville Temperature Statistics

January Temperature

Napa, Napa County Airport (8.7 miles)

  • Lowest 1 January, 2026

    48.9 °F

  • Average January

    55.1 °F

  • Highest 2 January, 2026

    61 °F

Climate (2021–Present)

Napa, Napa County Airport (8.7 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    70.1 °F
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