The best time to visit Lithuania depends on the kind of experience you are seeking. June to August is the peak summer season, offering warm temperatures, long daylight hours, and a vibrant outdoor festival calendar, making it ideal for exploring Vilnius Old Town, the Curonian Spit, and the country's many national parks and lakes. Spring, from April to May, and autumn, from September to October, offer milder temperatures and fewer crowds, making them ideal for sightseeing and cultural exploration. Winter, from December to February, is perfect for experiencing Lithuania's festive Christmas markets and the unique atmosphere of the Hill of Crosses covered in snow.