Steamboat Slough Weather Forecast

    • 41
    • 65

    Sunny

    • 41
    • 64

    Partly Sunny

    • 41
    • 63

    Partly Sunny

    • 41
    • 62

    Patchy Fog

    • 42
    • 61

    Areas Fog

    • 43
    • 58

    Fog

Today 16 Jan North Bay Interior Valleys

Sunny. Highs in the 60s to lower 70s. East Winds 5 to 10 Mph.

Tonight 16 Jan North Bay Interior Valleys

Clear, breezy. Patchy dense fog. Lows in the lower 40s to mid 50s. Northeast Winds 20 to 30 Mph.

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Steamboat Slough Temperature Statistics

January Temperature

Napa, Napa County Airport (7.5 miles)

  • Lowest 9 January, 2026

    32 °F

  • Average January

    49.8 °F

  • Highest 2 January, 2026

    61 °F

Climate (2021–Present)

Napa, Napa County Airport (7.5 miles)

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  • Average Low 2021–2026

    47.1 °F

  • Average 2021–2026

    58.1 °F

  • Average High 2021–2026

    70.1 °F
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