Steamboat Slough Weather Forecast

    • 54
    • 82

    Increasing Clouds

    • 53
    • 79

    Partly Sunny

    • 55
    • 81

    Partly Sunny

    • 54
    • 80

    Partly Sunny

    • 54
    • 79

    Partly Sunny

    • 53
    • 78

    Mostly Sunny

    • 54
    • 80

    Mostly Sunny

Today 16 Aug North Bay Interior Valleys

Partly cloudy. Highs in the 70s to 80s. Southwest Winds 10 to 15 Mph.

Tonight 16 Aug North Bay Interior Valleys

Partly cloudy in the evening then becoming mostly cloudy. Patchy fog after midnight. Lows in the 50s. Southwest Winds 5 to 10 Mph.

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  • Temperature Forecast NOAA

  • Temperature Real-Time

Steamboat Slough Temperature Statistics

August Temperature

Napa, Napa County Airport (7.5 miles)

  • Lowest 6 August, 2026

    51.7 °F

  • Average August

    66.3 °F

  • Highest 2 August, 2026

    86.6 °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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