July in Ulan Bator is the rainiest, the cloudiest, and the warmest month of the year. In July, the weather in Ulan Bator is typically warm. Average daily high temperature in July is about 23 degrees above zero. On average, Ulan Bator has 12 rainy, 10 partly cloudy, 7 sunny, and 2 cloudy days in July. The rains are usually moderate.