April in Kostino is the rainiest month of the year. In April, the weather in Kostino is typically cold. Average daily high temperature in April is about 10 degrees above zero. On average, Kostino has 13 rainy, 11 cloudy, 5 sunny, and 1 partly cloudy day in April. The rains are usually light. April as well as January, March, October, and November is considered the most uncomfortable time to visit Kostino.