May in San Martin De Los Andes is the rainiest month of the year. In May, the weather in San Martin De Los Andes is typically cold. Average daily high temperature in May is about 7 degrees above zero. On average, San Martin De Los Andes has 12 rainy, 8 partly cloudy, 6 cloudy, and 5 sunny days in May. The rains are usually heavy. May as well as April, June, July, and August is considered the most uncomfortable time to visit San Martin De Los Andes.