May in Arkansas City is the rainiest month of the year. In May, the weather in Arkansas City is typically warm. Average daily high temperature in May is about 25 degrees above zero. On average, Arkansas City has 13 sunny, 12 rainy, 4 partly cloudy, and 2 cloudy days in May. The rains are usually heavy. May as well as January, February, March, and June is considered the most uncomfortable time to visit Arkansas City.