In September, the weather in Coyhaique is typically cold. Average daily high temperature in September is about 6 degrees above zero. On average, Coyhaique has 14 rainy, 9 cloudy, 5 partly cloudy, and 2 sunny days in September. The rains are usually heavy. September as well as January, March, April, and May is considered the most uncomfortable time to visit Coyhaique.