The best time of year to visit Changwon in South Korea. Here are some average weather facts we collected from our historical climate data: During the month of. Country. Changwon is a city in South Korea. Time Zone. The name of the time zone is Asia/Seoul. Population. , People. Based on the tourism score, the best times of year to visit Changwon for warm-​weather activities are from late May to late June and from mid August to late. Changwon Hotels Rooms. You can only leave a review within 28 days after check-out. NW 15 mph. The vertical gray bars new Moons and blue bars full Moons indicate key Moon phases. WSW 4 mph. All data relating to the Sun's position e. UV Index 0 of