September in Ho Chi Minh is the coldest month of the year. In September, the weather in Ho Chi Minh is typically hot. Average daily high temperature in September is about 28 degrees above zero. On average, Ho Chi Minh has 29 rainy and 1 sunny day in September. The rains are usually heavy. September as well as April, May, June, and July is considered the most uncomfortable time to visit Ho Chi Minh.