January in Ilhabela is the rainiest and the cloudiest month of the year. In January, the weather in Ilhabela is typically warm. Average daily high temperature in January is about 27 degrees above zero. On average, Ilhabela has 24 rainy, 3 cloudy, 2 sunny, and 2 partly cloudy days in January. The rains are usually heavy. January as well as February, March, October, and November is considered the most uncomfortable time to visit Ilhabela.