May in Midwest City is the rainiest and the cloudiest month of the year. In May, the weather in Midwest City is typically warm. Average daily high temperature in May is about 27 degrees above zero. On average, Midwest City has 11 rainy, 11 sunny, 7 partly cloudy, and 2 cloudy days in May. The rains are usually heavy. May as well as January, February, June, and July is considered the most uncomfortable time to visit Midwest City.