August in Puerto Varas is the rainiest, the windiest, and the cloudiest month of the year. In August, the weather in Puerto Varas is typically cold. Average daily high temperature in August is about 9 degrees above zero. On average, Puerto Varas has 28 rainy and 3 sunny days in August. The rains are usually heavy. August as well as April, May, June, and July is considered the most uncomfortable time to visit Puerto Varas.