January in Açailândia is the rainiest month of the year. In January, the weather in Açailândia is typically hot. Average daily high temperature in January is about 28 degrees above zero. On average, Açailândia has 30 rainy and 1 sunny day in January. The rains are usually heavy. January as well as February, March, April, and May is considered the most uncomfortable time to visit Açailândia.