May in Achinsk is the windiest month of the year. In May, the weather in Achinsk is typically warm. Average daily high temperature in May is about 12 degrees above zero. On average, Achinsk has 14 rainy, 9 cloudy, 4 sunny, and 4 partly cloudy days in May. The rains are usually moderate. May as well as January, February, April, and September is considered the most uncomfortable time to visit Achinsk.