October in Santana de Parnaíba is the windiest month of the year. In October, the weather in Santana de Parnaíba is typically warm. Average daily high temperature in October is about 23 degrees above zero. On average, Santana de Parnaíba has 22 rainy, 4 sunny, 4 cloudy, and 1 partly cloudy day in October. The rains are usually heavy. October as well as January, February, March, and April is considered the most uncomfortable time to visit Santana de Parnaíba.