July in Suzhou is the rainiest and the hottest month of the year. In July, the weather in Suzhou is typically hot. Average daily high temperature in July is about 31 degrees above zero. On average, Suzhou has 24 rainy, 6 sunny, and 1 cloudy day in July. The rains are usually heavy. July as well as January, June, and August is considered the most uncomfortable time to visit Suzhou.