January in Cajamarca is the cloudiest month of the year. In January, the weather in Cajamarca is typically warm. Average daily high temperature in January is about 16 degrees above zero. On average, Cajamarca has 28 rainy, 2 partly cloudy, and 1 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 Cajamarca.