August in Pervomayskiy is the sunniest and the hottest month of the year. In August, the weather in Pervomayskiy is typically hot. Average daily high temperature in August is about 28 degrees above zero. On average, Pervomayskiy has 28 sunny and 3 rainy days in August. The rains are usually light. August as well as September is considered the most comfortable time to visit Pervomayskiy.