January in Itabuna is the sunniest month of the year. In January, the weather in Itabuna is typically hot. Average daily high temperature in January is about 28 degrees above zero. On average, Itabuna has 19 rainy, 10 sunny, and 2 partly cloudy days in January. The rains are usually heavy. January as well as February, March, April, and July is considered the most uncomfortable time to visit Itabuna.