May in Chumikan is the rainiest and the cloudiest month of the year. In May, the weather in Chumikan is typically cold. Average daily high temperature in May is about 8 degrees above zero. On average, Chumikan has 12 rainy, 7 sunny, 7 partly cloudy, and 5 cloudy days in May. The rains are usually moderate. May as well as January, February, November, and December is considered the most uncomfortable time to visit Chumikan.