May in Naftalan is the rainiest month of the year. In May, the weather in Naftalan is typically warm. Average daily high temperature in May is about 22 degrees above zero. On average, Naftalan has 19 rainy, 10 sunny, and 2 partly cloudy days in May. The rains are usually heavy. May as well as January, February, and April is considered the most uncomfortable time to visit Naftalan.