In September, the weather in Cerro de Pasco is typically warm. Average daily high temperature in September is about 10 degrees above zero. On average, Cerro de Pasco has 23 rainy, 4 partly cloudy, and 3 sunny days in September. The rains are usually heavy. September as well as January, February, March, and April is considered the most uncomfortable time to visit Cerro de Pasco.