July in Manzanillo is the hottest month of the year. In July, the weather in Manzanillo is typically hot. Average daily high temperature in July is about 33 degrees above zero. On average, Manzanillo has 19 rainy, 10 sunny, and 2 partly cloudy days in July. The rains are usually heavy. July as well as May, June, August, and September is considered the most uncomfortable time to visit Manzanillo.