January in Santana de Parnaíba is the rainiest and the cloudiest month of the year. In January, the weather in Santana de Parnaíba is typically warm. Average daily high temperature in January is about 24 degrees above zero. On average, Santana de Parnaíba has 28 rainy and 3 sunny days in January. The rains are usually heavy. January as well as February, March, April, and October is considered the most uncomfortable time to visit Santana de Parnaíba.