January in Medellin is the sunniest month of the year. In January, the weather in Medellin is typically warm. Average daily high temperature in January is about 21 degrees above zero. On average, Medellin has 22 rainy, 5 cloudy, 3 sunny, and 1 partly cloudy 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 Medellin.