January in Itumbiara is the rainiest and the cloudiest month of the year. In January, the weather in Itumbiara is typically hot. Average daily high temperature in January is about 29 degrees above zero. On average, Itumbiara has 24 rainy, 4 cloudy, 2 sunny, and 1 partly cloudy day in January. The rains are usually heavy. January as well as February, March, October, and November is considered the most uncomfortable time to visit Itumbiara.