January in Sao Jose Do Rio Preto is the rainiest and the cloudiest month of the year. In January, the weather in Sao Jose Do Rio Preto is typically warm. Average daily high temperature in January is about 27 degrees above zero. On average, Sao Jose Do Rio Preto has 28 rainy and 3 sunny days in January. The rains are usually heavy. January as well as February, March, November, and December is considered the most uncomfortable time to visit Sao Jose Do Rio Preto.