August in San Martin De Los Andes is the rainiest and the snowiest month of the year. In August, the weather in San Martin De Los Andes is typically cold. Average daily high temperature in August is about 2 degrees above zero. On average, San Martin De Los Andes has 26 rainy, 3 sunny, 1 snowy, and 1 cloudy day in August. The rains are usually heavy. August as well as May, June, July, and September is considered the most uncomfortable time to visit San Martin De Los Andes.