December in Nova Iguaçu is the rainiest and the cloudiest month of the year. In December, the weather in Nova Iguaçu is typically hot. Average daily high temperature in December is about 28 degrees above zero. On average, Nova Iguaçu has 27 rainy and 4 sunny days in December. The rains are usually heavy. December as well as January, March, and November is considered the most uncomfortable time to visit Nova Iguaçu.