January in Santa Cruz do Sul is the rainiest month of the year. In January, the weather in Santa Cruz do Sul is typically hot. Average daily high temperature in January is about 28 degrees above zero. On average, Santa Cruz do Sul has 14 sunny, 13 rainy, and 4 partly cloudy days in January. The rains are usually heavy. January as well as February and October is considered the most uncomfortable time to visit Santa Cruz do Sul.