Napa River - Edgerley Island Weather Forecast

    • 57
    • 84

    Increasing Clouds

    • 57
    • 82

    Mostly Sunny

    • 59
    • 84

    Mostly Cloudy

    • 60
    • 86

    Partly Sunny

    • 60
    • 83

    Mostly Sunny

    • 59
    • 84

    Mostly Sunny

Today 30 Sep North Bay Interior Valleys

Sunny. Highs in the upper 70s to lower 90s. South Winds 5 to 15 Mph.

Tonight 30 Sep North Bay Interior Valleys

Clear in the evening then becoming partly cloudy. Lows in the 50s to lower 60s. West Winds 5 to 10 Mph. Becoming northeast after midnight.

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Napa River - Edgerley Island Temperature Statistics

September Temperature

Napa, Napa County Airport (1.9 miles)

  • Lowest 6 September, 2026

    45.6 °F

  • Average September

    65.6 °F

  • Highest 9 September, 2026

    99.6 °F

Climate (2021–2026)

Napa, Napa County Airport (1.9 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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