In September, the weather in Malargue is typically cold. Average daily high temperature in September is about 8 degrees above zero. On average, Malargue has 14 sunny, 7 partly cloudy, 5 rainy, 2 snowy, and 2 cloudy days in September. The rains are usually heavy. September as well as April, May, June, and July is considered the most uncomfortable time to visit Malargue.