January in Guaruja is the rainiest and the cloudiest month of the year. In January, the weather in Guaruja is typically warm. Average daily high temperature in January is about 27 degrees above zero. On average, Guaruja has 18 rainy, 6 sunny, 5 partly cloudy, and 2 cloudy days in January. The rains are usually heavy. January as well as {{month_nom: February}}, and {{month_nom: February}} is considered the most uncomfortable time to visit Guaruja.