May in Uthai Thani is the cloudiest month of the year. In May, the weather in Uthai Thani is typically hot. Average daily high temperature in May is about 34 degrees above zero. On average, Uthai Thani has 25 rainy and 6 cloudy days in May. The rains are usually heavy. May as well as June, July, August, and September is considered the most uncomfortable time to visit Uthai Thani.