May in Cobán is the warmest month of the year. In May, the weather in Cobán is typically warm. Average daily high temperature in May is about 27 degrees above zero. On average, Cobán has 24 rainy, 4 sunny, 2 partly cloudy, and 1 cloudy day in May. The rains are usually heavy. May as well as June, July, August, and September is considered the most uncomfortable time to visit Cobán.