Napa River - Steamboat Slough Entrance Weather Forecast

    • 40
    • 55

    Rain

    • 40
    • 57

    Rain

    • 45
    • 59

    Chance Rain

    • 46
    • 62

    Rain

    • 37
    • 59

    Rain Likely

    • 37
    • 62

    Mostly Sunny

    • 41
    • 60

    Mostly Cloudy

Today 13 Mar North Bay Interior Valleys

Partly cloudy. A slight chance of rain. Highs in the 50s. West Winds 10 to 20 Mph.

Tonight 13 Mar North Bay Interior Valleys

Rain. Lows in the upper 30s to mid 40s. West Winds 10 to 20 Mph. Becoming southeast after midnight.

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Napa River - Steamboat Slough Entrance Temperature Statistics

March Temperature

Napa, Napa County Airport (1.9 miles)

  • Lowest 7 March, 2025

    33.7 °F

  • Average March

    50.7 °F

  • Highest 7 March, 2025

    68.6 °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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