May in Dilijan is the rainiest month of the year. In May, the weather in Dilijan is typically warm. Average daily high temperature in May is about 14 degrees above zero. On average, Dilijan has 25 rainy, 4 sunny, and 2 partly cloudy days in May. The rains are usually heavy. May as well as April, June, and July is considered the most uncomfortable time to visit Dilijan.