In August, the weather in El Chalten is typically cold. Average daily high temperature in August is about 1 degree above zero. On average, El Chalten has 12 rainy, 8 partly cloudy, 7 sunny, 2 snowy, and 2 cloudy days in August. The rains are usually moderate. August as well as April, May, June, and July is considered the most uncomfortable time to visit El Chalten.