June in Ayutthaya is the cloudiest month of the year. In June, the weather in Ayutthaya is typically hot. Average daily high temperature in June is about 32 degrees above zero. On average, Ayutthaya has 29 rainy and 1 cloudy day in June. The rains are usually heavy. June as well as May, July, August, and September is considered the most uncomfortable time to visit Ayutthaya.