May in Wichita Falls is the rainiest and the cloudiest month of the year. In May, the weather in Wichita Falls is typically hot. Average daily high temperature in May is about 29 degrees above zero. On average, Wichita Falls has 11 sunny, 10 rainy, 9 partly cloudy, and 1 cloudy day in May. The rains are usually heavy. May as well as June, July, and August is considered the most uncomfortable time to visit Wichita Falls.