Napa Weather Forecast

    • 37
    • 59

    Mostly Sunny

    • 43
    • 55

    Mostly Cloudy

    • 45
    • 50

    Rain

    • 46
    • 53

    Rain

    • 47
    • 54

    Rain Likely

    • 47
    • 53

    Rain Likely

Today 29 Dec North Bay Interior Valleys

Sunny. Highs in the mid 50s to lower 60s. East Winds 10 to 20 Mph. Becoming south 10 to 15 Mph in the afternoon.

Tonight 29 Dec North Bay Interior Valleys

Mostly clear. Lows in the 30s to mid 40s. East Winds 5 to 15 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

    48.8 °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

    47.1 °F

  • Average 2020–2025

    58.1 °F

  • Average High 2020–2025

    70.1 °F
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