In May, the weather in San Martin De Los Andes is typically cold. Average daily high temperature in May is about 6 degrees above zero. On average, San Martin De Los Andes has 16 rainy, 11 cloudy, and 4 sunny 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 San Martin De Los Andes.