Steamboat Slough Weather Forecast

    • 42
    • 72

    Becoming Sunny

    • 43
    • 69

    Mostly Sunny

    • 46
    • 75

    Mostly Sunny

    • 47
    • 78

    Mostly Sunny

    • 48
    • 76

    Mostly Sunny

    • 51
    • 77

    Partly Sunny

Today 9 Mar North Bay Interior Valleys

Sunny. Highs in the 60s to mid 70s. Northwest Winds up to 5 Mph increasing to west 10 to 15 Mph in the afternoon.

Tonight 9 Mar North Bay Interior Valleys

Mostly clear. Lows in the 40s to lower 50s. West Winds 10 to 15 Mph.

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Steamboat Slough Temperature Statistics

March Temperature

Napa, Napa County Airport (7.5 miles)

  • Lowest 5 March, 2026

    37.9 °F

  • Average March

    58 °F

  • Highest 7 March, 2026

    77 °F

Climate (2021–Present)

Napa, Napa County Airport (7.5 miles)

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  • Average Low 2021–2026

    47.2 °F

  • Average 2021–2026

    58.2 °F

  • Average High 2021–2026

    70.1 °F
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