July in Arvaikheer is the warmest month of the year. In July, the weather in Arvaikheer is typically warm. Average daily high temperature in July is about 20 degrees above zero. On average, Arvaikheer has 15 partly cloudy, 8 sunny, 4 rainy, and 4 cloudy days in July. The rains are usually light. July as well as August is considered the most comfortable time to visit Arvaikheer.