May in El Bolson is the cloudiest month of the year. In May, the weather in El Bolson is typically cold. Average daily high temperature in May is about 6 degrees above zero. On average, El Bolson has 17 rainy, 7 cloudy, 4 sunny, and 3 partly cloudy days in May. The rains are usually heavy. May as well as June, July, August, and September is considered the most uncomfortable time to visit El Bolson.