August in Petropavlovsk is the rainiest and the cloudiest month of the year. In August, the weather in Petropavlovsk is typically warm. Average daily high temperature in August is about 16 degrees above zero. On average, Petropavlovsk has 13 rainy, 8 cloudy, 6 partly cloudy, and 4 sunny days in August. The rains are usually heavy. August as well as January, February, April, and May is considered the most uncomfortable time to visit Petropavlovsk.