July in Bol'shoy Serdezh is the sunniest and the warmest month of the year. In July, the weather in Bol'shoy Serdezh is typically warm. Average daily high temperature in July is about 24 degrees above zero. On average, Bol'shoy Serdezh has 12 sunny, 11 rainy, and 8 partly cloudy days in July. The rains are usually moderate.