July in Buenos Aires is the coldest month of the year. In July, the weather in Buenos Aires is typically warm. Average daily high temperature in July is about 13 degrees above zero. On average, Buenos Aires has 14 sunny, 12 partly cloudy, 4 rainy, and 1 cloudy day in July. The rains are usually light. July as well as June and September is considered the most uncomfortable time to visit Buenos Aires.