June in Foz do Iguaçu is the coldest month of the year. In June, the weather in Foz do Iguaçu is typically warm. Average daily high temperature in June is about 20 degrees above zero. On average, Foz do Iguaçu has 10 sunny, 8 rainy, 8 partly cloudy, and 4 cloudy days in June. The rains are usually heavy.