Napa Weather Forecast

    • 41
    • 55

    Mostly Sunny

    • 41
    • 57

    Mostly Sunny

    • 40
    • 58

    Mostly Sunny

    • 41
    • 60

    Mostly Sunny

    • 42
    • 59

    Fog

    • 48
    • 58

    Fog

    • 49
    • 60

    Mostly Cloudy

Today 10 Dec North Bay Interior Valleys

Partly cloudy late in the morning then becoming sunny. Patchy fog late in the morning. Highs in the mid 40s to lower 60s. Southeast Winds 5 to 10 Mph.

Tonight 10 Dec North Bay Interior Valleys

Mostly clear except patchy fog in the evening. Areas of dense fog after midnight. Lows in the upper 30s to lower 50s. East Winds up to 5 Mph.

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Napa Temperature Statistics

December Temperature

Napa, Napa County Airport (6.2 miles)

  • Lowest 2 December, 2025

    37 °F

  • Average December

    45.5 °F

  • Highest 3 December, 2025

    66 °F

Climate (2020–Present)

Napa, Napa County Airport (6.2 miles)

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  • Average Low 2020–2025

    47 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    70.1 °F
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