2. South Korea has a mild climate, and it will be one of the greatest pleasures to watch the landscape changing in four seasons, among which autumn is the best season for tourism. Spring lasts from March to May. The climate is warm and flowers are everywhere. At the end of March, the cherry blossoms in Jeju Island opened first; In mid-April, Seoul was in full bloom, and the Gyeongbokgung Palace was covered with branches of winter jasmine, azaleas, peach blossoms and pear blossoms.