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In Napa, the climate is warm and temperate. The winters are rainier than the summers in Napa. The climate here is classified as Csc by the Köppen-Geiger. The temperature in this location is approximately 15.0 °C | 59.0 °F, as determined by statistical analysis.
The hottest month of the year in Napa is July, with an average high of 82°F and low of 56°F. The cool season lasts for 2.4 months, from November 28 to February 10, with an average daily high temperature below 60°F. The coldest month of the year in Napa is January, with an average low of 40°F and high of 56°F.
Temperatures, hours of sunshine and precipitation. The yearly temperature in Napa Valley ranges significantly, from cool winters averaging around 9°C (48°F) to warm summers with average highs around 21°C (70°F).
Plan your visit with detailed insights on the climate in Napa (CA) by month. Get accurate forecasts for Napa temperature & weather by month, days, & hours.
Napa weather averages and climate Napa, California. Monthly temperature, precipitation and hours of sunshine. A climate graph showing rainfall, temperatures and normals.
Thanks to a mild, Mediterranean climate, Napa Valley is not only an idyllic place to grow grapes, it’s also a welcoming destination for visitors any time of year. Though temperate year-round, summers tend to be warm and dry with plenty of sun, while winters can bring rain and cooler, cloudy days.
Climate Averages, Frost Dates, Hardiness Zones and Drought Conditions for Napa California
