In terms of precipitation, rainfall in Cajamarca ranges from 0.0 - 5.5 inches per month. January is typically the wettest month, when rainfall can reach 5.5 in. July is typically the driest time to visit Cajamarca when rainfall is around 0.0 in.
If weather is an important factor for your trip to Cajamarca, use this chart to help with planning. For those seeking warmer temperatures, January is the ideal time of year to visit, when temperatures reach an average of 57.2 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 53.6 F).