Napa Valley Wine Country is a year-round destination, but the best time to visit depends on personal preferences. Spring (April-May) offers mild temperatures and beautiful blooming vineyards, while summer (June-August) is perfect for outdoor activities and events. The fall harvest season (September-November) is known for its vibrant colors and grape-picking festivities. Winter (December-February) provides a quieter atmosphere with the opportunity to cozy up by fireplaces and enjoy fewer crowds.