Napa River - Fagan Slough Entrance Weather Forecast

    • 53
    • 73

    Becoming Sunny

    • 55
    • 75

    Partly Sunny

    • 55
    • 76

    Mostly Sunny

    • 53
    • 75

    Mostly Sunny

    • 55
    • 81

    Mostly Sunny

    • 54
    • 82

    Mostly Sunny

Today 24 Jun North Bay Interior Valleys

Mostly cloudy in the morning then becoming sunny. Patchy fog in the morning. Highs in the upper 60s to lower 80s. Southwest Winds 10 to 15 Mph.

Tonight 24 Jun North Bay Interior Valleys

Mostly clear in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows in the lower to mid 50s. Southwest Winds 10 to 15 Mph.

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Napa River - Fagan Slough Entrance Temperature Statistics

June Temperature

Napa, Napa County Airport (1.2 miles)

  • Lowest 7 June, 2026

    45.6 °F

  • Average June

    66.4 °F

  • Highest 11 June, 2026

    96.7 °F

Climate (2021–2026)

Napa, Napa County Airport (1.2 miles)

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  • Average Low 2021–2026

    47.3 °F

  • Average 2021–2026

    58.4 °F

  • Average High 2021–2026

    70.2 °F
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