In terms of precipitation, rainfall in Tarija ranges from 0.0 - 4.7 inches per month. January is typically the wettest month, when rainfall can reach 4.7 in. May is typically the driest time to visit Tarija when rainfall is around 0.0 in.
If weather is an important factor for your trip to Tarija, use this chart to help with planning. For those seeking warmer temperatures, February is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of June, when temperatures are typically at their lowest (around 60.8 F).