Montalvin Park Weather Forecast

    • 57
    • 75

    Mostly Sunny

    • 58
    • 76

    Partly Sunny

    • 57
    • 68

    Mostly Cloudy

    • 58
    • 68

    Partly Sunny

    • 58
    • 71

    Mostly Sunny

    • 60
    • 81

    Mostly Sunny

    • 60
    • 81

    Mostly Sunny

Today 18 Sep East Bay Interior Valleys

Sunny. Highs in the mid 80s. West Winds 5 to 15 Mph.

Tonight 18 Sep East Bay Interior Valleys

Clear. Lows in the upper 50s. Southwest Winds 5 to 10 Mph.

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Montalvin Park Temperature Statistics

September Temperature

Napa, Napa County Airport (14.3 miles)

  • Lowest 6 September, 2026

    45.6 °F

  • Average September

    66.6 °F

  • Highest 9 September, 2026

    99.6 °F

Climate (2021–2026)

Napa, Napa County Airport (14.3 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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