July in Rancagua is the windiest and the coldest month of the year. In July, the weather in Rancagua is typically warm. Average daily high temperature in July is about 13 degrees above zero. On average, Rancagua has 13 sunny, 11 partly cloudy, 4 rainy, and 3 cloudy days in July. The rains are usually light. July as well as June and August is considered the most uncomfortable time to visit Rancagua.