July in Bol'shie Klyuchishchi is the sunniest and the warmest month of the year. In July, the weather in Bol'shie Klyuchishchi is typically warm. Average daily high temperature in July is about 25 degrees above zero. On average, Bol'shie Klyuchishchi has 17 sunny, 11 rainy, and 3 partly cloudy days in July. The rains are usually heavy.