August in Nova Iguaçu is the sunniest month of the year. In August, the weather in Nova Iguaçu is typically warm. Average daily high temperature in August is about 25 degrees above zero. On average, Nova Iguaçu has 20 sunny, 8 partly cloudy, and 3 rainy days in August. The rains are usually light. August as well as July is considered the most comfortable time to visit Nova Iguaçu.