July in Tandil is the coldest month of the year. In July, the weather in Tandil is typically warm. Average daily high temperature in July is about 11 degrees above zero. On average, Tandil has 13 partly cloudy, 12 sunny, 3 rainy, and 3 cloudy days in July. The rains are usually light. July as well as June is considered the most uncomfortable time to visit Tandil.