January in Caxias is the rainiest and the cloudiest month of the year. In January, the weather in Caxias is typically hot. Average daily high temperature in January is about 30 degrees above zero. On average, Caxias has 30 rainy and 1 sunny day in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Caxias.