July in Sumon Chaa-Khol'sky is the warmest month of the year. In July, the weather in Sumon Chaa-Khol'sky is typically warm. Average daily high temperature in July is about 22 degrees above zero. On average, Sumon Chaa-Khol'sky has 15 partly cloudy, 14 sunny, and 2 rainy days in July. The rains are usually heavy. July as well as June is considered the most comfortable time to visit Sumon Chaa-Khol'sky.