January in Chacabuco is the hottest month of the year. In January, the weather in Chacabuco is typically hot. Average daily high temperature in January is about 29 degrees above zero. On average, Chacabuco has 15 sunny, 9 rainy, 6 partly cloudy, and 1 cloudy day in January. The rains are usually heavy. January as well as February, March, June, and July is considered the most uncomfortable time to visit Chacabuco.