In May, the weather in Mỹ Tho is typically hot. Average daily high temperature in May is about 33 degrees above zero. On average, Mỹ Tho has 26 rainy, 3 sunny, and 2 partly cloudy days in May. The rains are usually heavy. May as well as April, June, July, and August is considered the most uncomfortable time to visit Mỹ Tho.