April in Kozmodemyansk is the rainiest month of the year. In April, the weather in Kozmodemyansk is typically cold. Average daily high temperature in April is about 5 degrees above zero. On average, Kozmodemyansk has 23 rainy, 5 cloudy, 1 sunny, and 1 partly cloudy day in April. The rains are usually moderate. April as well as January, February, September, and October is considered the most uncomfortable time to visit Kozmodemyansk.