April in Sukhothai is the hottest month of the year. In April, the weather in Sukhothai is typically hot. Average daily high temperature in April is about 38 degrees above zero. On average, Sukhothai has 16 sunny, 9 rainy, and 5 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 Sukhothai.