May in Quezaltenango is the rainiest and the cloudiest month of the year. In May, the weather in Quezaltenango is typically warm. Average daily high temperature in May is about 20 degrees above zero. On average, Quezaltenango has 31 rainy days in May. The rains are usually heavy. May as well as June, July, August, and September is considered the most uncomfortable time to visit Quezaltenango.