Near-perfect spring weather is in store for Saturday, the day of the K-pop megaband BTS' comeback concert in Seoul, with daytime highs reaching around 15 degrees Celsius, Korea's weather agency said Wednesday. However, those attending the outdoor concert should be mindful of the sharp temperature swings typical of springtime in Korea, and are advised to dress in layers and bring a jacket. According to the Korea Meteorological Administration, temperatures are expected to drop to around 4 degrees