December in Cajamarca is the coldest month of the year. In December, the weather in Cajamarca is typically warm. Average daily high temperature in December is about 16 degrees above zero. On average, Cajamarca has 26 rainy, 2 sunny, 2 cloudy, and 1 partly cloudy day in December. The rains are usually heavy. December as well as January, February, March, and April is considered the most uncomfortable time to visit Cajamarca.