December in Cachoeiro de Itapemirim is the rainiest month of the year. In December, the weather in Cachoeiro de Itapemirim is typically hot. Average daily high temperature in December is about 28 degrees above zero. On average, Cachoeiro de Itapemirim has 23 rainy, 5 sunny, and 3 cloudy days in December. The rains are usually heavy. December as well as March and November is considered the most uncomfortable time to visit Cachoeiro de Itapemirim.