Second Napa Slough Weather Forecast

    • 52
    • 79

    Mostly Sunny

    • 51
    • 82

    Partly Sunny

    • 48
    • 64

    Slight Chance Rain

    • 43
    • 61

    Slight Chance Rain

    • 39
    • 61

    Partly Sunny

    • 45
    • 62

    Rain Likely

    • 46
    • 59

    Chance Rain

Today 24 Mar North Bay Interior Valleys

Sunny. Highs in the 70s to 80s. East Winds up to 5 Mph. Becoming south around 5 Mph in the afternoon.

Tonight 24 Mar North Bay Interior Valleys

Mostly clear. Lows in the 50s to lower 60s. Northwest Winds up to 5 Mph. Becoming north after midnight.

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Second Napa Slough Temperature Statistics

March Temperature

Napa, Napa County Airport (6.8 miles)

  • Lowest 7 March, 2025

    33.7 °F

  • Average March

    50.6 °F

  • Highest 7 March, 2025

    68.6 °F

Climate (2020–Present)

Napa, Napa County Airport (6.8 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    70.7 °F
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