May in Trest is the rainiest month of the year. In May, the weather in Trest is typically warm. Average daily high temperature in May is about 15 degrees above zero. On average, Trest has 20 rainy, 8 sunny, 2 partly cloudy, and 1 cloudy day in May. The rains are usually heavy. May as well as March, April, October, and November is considered the most uncomfortable time to visit Trest.