January in Ubatuba is the cloudiest month of the year. In January, the weather in Ubatuba is typically warm. Average daily high temperature in January is about 25 degrees above zero. On average, Ubatuba has 25 rainy, 5 sunny, and 1 partly cloudy day in January. The rains are usually heavy. January as well as March, October, November, and December is considered the most uncomfortable time to visit Ubatuba.