May in Petropavlovsk is the cloudiest month of the year. In May, the weather in Petropavlovsk is typically cold. Average daily high temperature in May is about 6 degrees above zero. On average, Petropavlovsk has 15 cloudy, 7 rainy, 5 partly cloudy, and 4 sunny days in May. The rains are usually moderate. May as well as April and October is considered the most uncomfortable time to visit Petropavlovsk.