In terms of precipitation, rainfall in Teresina ranges from 0.3 - 11.6 inches per month. March is typically the wettest month, when rainfall can reach 11.6 in. August is typically the driest time to visit Teresina when rainfall is around 0.3 in.
If weather is an important factor for your trip to Teresina, use this chart to help with planning. For those seeking warmer temperatures, November is the ideal time of year to visit, when temperatures reach an average of 84.2 F. Travelers looking to avoid the cold should look outside of March, when temperatures are typically at their lowest (around 78.8 F).