Napa River - Steamboat Slough Entrance Weather Forecast

    • 50
    • 76

    Mostly Sunny

    • 54
    • 81

    Mostly Sunny

    • 52
    • 84

    Mostly Sunny

    • 50
    • 76

    Mostly Sunny

    • 50
    • 73

    Mostly Sunny

    • 52
    • 73

    Mostly Sunny

    • 52
    • 79

    Sunny

Today 16 Jun North Bay Interior Valleys

Sunny, breezy. Highs in the upper 60s to lower 80s. West Winds 10 to 20 Mph increasing to 20 to 30 Mph in the afternoon.

Tonight 16 Jun North Bay Interior Valleys

Mostly clear. Breezy. Lows in the upper 40s to mid 50s. West Winds 20 to 30 Mph decreasing to 10 to 20 Mph after midnight.

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Napa River - Steamboat Slough Entrance Temperature Statistics

June Temperature

Napa, Napa County Airport (1.9 miles)

  • Lowest 12 June, 2025

    44.1 °F

  • Average June

    62 °F

  • Highest 2 June, 2025

    76.6 °F

Climate (2020–Present)

Napa, Napa County Airport (1.9 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    70.6 °F
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