January in Barra Mansa is the rainiest month of the year. In January, the weather in Barra Mansa is typically hot. Average daily high temperature in January is about 28 degrees above zero. On average, Barra Mansa has 23 rainy, 3 sunny, 3 partly cloudy, and 2 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 Barra Mansa.