December in Goiânia is the rainiest month of the year. In December, the weather in Goiânia is typically hot. Average daily high temperature in December is about 28 degrees above zero. On average, Goiânia has 24 rainy, 3 partly cloudy, 2 sunny, and 2 cloudy days in December. The rains are usually heavy. December as well as January, February, March, and October is considered the most uncomfortable time to visit Goiânia.