August in Pervomayskiy is the sunniest month of the year. In August, the weather in Pervomayskiy is typically warm. Average daily high temperature in August is about 27 degrees above zero. On average, Pervomayskiy has 21 sunny, 8 partly cloudy, and 2 rainy days in August. The rains are usually light. August as well as September is considered the most comfortable time to visit Pervomayskiy.