August in Petropavlovskaya is the sunniest and the hottest month of the year. In August, the weather in Petropavlovskaya is typically hot. Average daily high temperature in August is about 30 degrees above zero. On average, Petropavlovskaya has 26 sunny, 4 rainy, and 1 partly cloudy day in August. The rains are usually light. August as well as September is considered the most comfortable time to visit Petropavlovskaya.