July in Nantou is the rainiest and the hottest month of the year. In July, the weather in Nantou is typically hot. Average daily high temperature in July is about 30 degrees above zero. On average, Nantou has 22 rainy, 5 sunny, 3 cloudy, and 1 partly cloudy day in July. The rains are usually heavy. July as well as June and August is considered the most uncomfortable time to visit Nantou.