In October, the weather in Foz do Iguaçu is typically hot. Average daily high temperature in October is about 28 degrees above zero. On average, Foz do Iguaçu has 14 rainy, 9 sunny, 6 partly cloudy, and 2 cloudy days in October. The rains are usually heavy. October as well as January, February, March, and December is considered the most uncomfortable time to visit Foz do Iguaçu.