May in Ennis is the sunniest month of the year. In May, the weather in Ennis is typically warm. Average daily high temperature in May is about 13 degrees above zero. On average, Ennis has 23 rainy, 5 sunny, 2 cloudy, and 1 partly cloudy day in May. The rains are usually moderate. May as well as January, February, March, and April is considered the most uncomfortable time to visit Ennis.