In December, the weather in Bucaramanga is typically warm. Average daily high temperature in December is about 20 degrees above zero. On average, Bucaramanga has 20 rainy, 7 cloudy, 2 sunny, and 2 partly cloudy days in December. The rains are usually heavy. December as well as March, April, May, and June is considered the most uncomfortable time to visit Bucaramanga.