January in Sao Jose dos Campos is the rainiest and the cloudiest month of the year. In January, the weather in Sao Jose dos Campos is typically warm. Average daily high temperature in January is about 25 degrees above zero. On average, Sao Jose dos Campos has 27 rainy and 4 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 Sao Jose dos Campos.