April in Rayong is the hottest month of the year. In April, the weather in Rayong is typically hot. Average daily high temperature in April is about 30 degrees above zero. On average, Rayong has 17 rainy, 9 sunny, and 4 partly cloudy days in April. The rains are usually moderate. April as well as May, June, July, and August is considered the most uncomfortable time to visit Rayong.