May in Tulun is the windiest month of the year. In May, the weather in Tulun is typically warm. Average daily high temperature in May is about 13 degrees above zero. On average, Tulun has 14 rainy, 11 cloudy, 4 sunny, and 2 partly cloudy days in May. The rains are usually light. May as well as January, February, April, and September is considered the most uncomfortable time to visit Tulun.