January in Itapecerica da Serra is the rainiest and the cloudiest month of the year. In January, the weather in Itapecerica da Serra is typically warm. Average daily high temperature in January is about 27 degrees above zero. On average, Itapecerica da Serra has 24 rainy, 4 partly cloudy, 2 cloudy, and 1 sunny day in January. The rains are usually heavy. January as well as February, March, November, and December is considered the most uncomfortable time to visit Itapecerica da Serra.