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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.
Vintage Charts. The NVV’s vintage charts depict key stages of the growing season from January through the middle of September, including the high and low temperatures for each day and rainfall amounts. Tracking these key stages plays an important role in the planning of the season and harvest logistics.
Climate Averages, Frost Dates, Hardiness Zones and Drought Conditions for Napa California
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). Winter months see about 6 to 7 hours of sunshine per day, which doubles to around 12 hours daily by summer, supporting both leisure and vineyard activities.
Napa Climate Graph - California Climate Chart. Napa weather averages and climate Napa, California. Monthly temperature, precipitation and hours of sunshine. A climate graph showing rainfall, temperatures and normals.
Climate Averages, Frost Dates, Hardiness Zones and Drought Conditions for Napa California
