July in Chumphon is the cloudiest month of the year. In July, the weather in Chumphon is typically hot. Average daily high temperature in July is about 29 degrees above zero. On average, Chumphon has 28 rainy and 3 cloudy days in July. The rains are usually moderate. July as well as April, May, June, and August is considered the most uncomfortable time to visit Chumphon.