In April, the weather in Mata De Sao Joao is typically hot. Average daily high temperature in April is about 28 degrees above zero. On average, Mata De Sao Joao has 17 rainy, 12 sunny, and 1 partly cloudy day in April. The rains are usually heavy. April as well as February, May, June, and July is considered the most uncomfortable time to visit Mata De Sao Joao.