January in Cruzeiro do Sul is the rainiest month of the year. In January, the weather in Cruzeiro do Sul is typically hot. Average daily high temperature in January is about 28 degrees above zero. On average, Cruzeiro do Sul has 16 rainy, 14 sunny, and 1 partly cloudy day in January. The rains are usually heavy. January as well as February is considered the most uncomfortable time to visit Cruzeiro do Sul.