In April, the weather in Santana de Parnaíba is typically warm. Average daily high temperature in April is about 22 degrees above zero. On average, Santana de Parnaíba has 21 rainy, 5 sunny, 3 partly cloudy, and 1 cloudy day in April. The rains are usually heavy. April as well as January, February, March, and October is considered the most uncomfortable time to visit Santana de Parnaíba.