April in Kosa is the rainiest month of the year. In April, the weather in Kosa is typically cold. Average daily high temperature in April is about 4 degrees above zero. On average, Kosa has 20 rainy, 8 cloudy, 1 snowy, and 1 sunny 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 Kosa.