Green Valley Lake Park Weather Forecast

    • 56
    • 73

    Increasing Clouds

    • 57
    • 79

    Mostly Sunny

    • 60
    • 89

    Mostly Sunny

    • 60
    • 86

    Mostly Sunny

    • 56
    • 81

    Mostly Sunny

    • 55
    • 79

    Mostly Sunny

    • 56
    • 77

    Mostly Sunny

Today 21 Sep Central Solano County Including Fairfield and Vacaville

Mostly sunny. Highs 74 to 80. Southwest Winds 10 to 15 Mph with Gusts to around 30 Mph.

Tonight 21 Sep Central Solano County Including Fairfield and Vacaville

Clear. Lows around 56. Southwest Winds 10 to 15 Mph with Gusts to around 25 Mph.

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  • Temperature Real-Time

Green Valley Lake Park Temperature Statistics

September Temperature

Napa, Napa County Airport (7.5 miles)

  • Lowest 6 September, 2026

    45.6 °F

  • Average September

    66.2 °F

  • Highest 9 September, 2026

    99.6 °F

Climate (2021–2026)

Napa, Napa County Airport (7.5 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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