Search results
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.
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 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.
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.
Climate Graph Napa and averages California. A Climate Chart and information about the temperature and precipitation.
This graph shows the average amount of rainfall per month in Napa (California). The numbers are calculated over a 30-year period to provide a reliable average. Most rainfall (rainy season) is seen in February and December. Napa has dry periods in May, June, July, August and September.
