In May, the weather in Kaohsiung is typically hot. Average daily high temperature in May is about 29 degrees above zero. On average, Kaohsiung has 17 rainy, 6 partly cloudy, 5 sunny, and 3 cloudy days in May. The rains are usually heavy. May as well as June, July, August, and September is considered the most uncomfortable time to visit Kaohsiung.