In May, the weather in San-Carlos-de-Bariloche is typically cold. Average daily high temperature in May is about 5 degrees above zero. On average, San-Carlos-de-Bariloche has 17 rainy, 9 cloudy, 4 sunny, and 1 partly cloudy day in May. The rains are usually heavy. May as well as June, July, August, and September is considered the most uncomfortable time to visit San-Carlos-de-Bariloche.