May in Khorramabad is the windiest month of the year. In May, the weather in Khorramabad is typically warm. Average daily high temperature in May is about 24 degrees above zero. On average, Khorramabad has 19 sunny, 9 partly cloudy, and 3 rainy days in May. The rains are usually light. May as well as October is considered the most comfortable time to visit Khorramabad.