April in Chumphon is the hottest month of the year. In April, the weather in Chumphon is typically hot. Average daily high temperature in April is about 32 degrees above zero. On average, Chumphon has 21 rainy, 7 sunny, and 2 partly cloudy days in April. The rains are usually heavy. April as well as May, June, July, and August is considered the most uncomfortable time to visit Chumphon.