Rockville Weather Forecast

    • 56
    • 76

    Decreasing Clouds

    • 56
    • 76

    Mostly Sunny

    • 56
    • 79

    Mostly Sunny

    • 61
    • 90

    Mostly Sunny

    • 61
    • 91

    Mostly Sunny

    • 59
    • 85

    Mostly Sunny

Today 20 Sep Central Solano County Including Fairfield and Vacaville

Mostly cloudy. Highs 76 to 82. Southwest Winds 10 to 15 Mph.

Tonight 20 Sep Central Solano County Including Fairfield and Vacaville

Mostly cloudy in the evening then becoming partly cloudy. Lows around 58. Southwest Winds 10 to 15 Mph with Gusts to around 30 Mph.

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Rockville Temperature Statistics

September Temperature

Napa, Napa County Airport (8.7 miles)

  • Lowest 6 September, 2026

    45.6 °F

  • Average September

    66.3 °F

  • Highest 9 September, 2026

    99.6 °F

Climate (2021–2026)

Napa, Napa County Airport (8.7 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    58.5 °F

  • Average High 2021–2026

    70.3 °F
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