Teresina, Brazil experiences a warm and humid climate throughout the year. The dry season begins in March and lasts until September, with temperatures gradually increasing during this period, reaching an average high of around 35°C by August and September. June and July are the coolest months, with average highs ranging from 19-21°C, but even then, the temperature can still rise to 34-36°C on some days. The wet season starts in October, bringing slightly cooler temperatures, but still warm overall. December marks the beginning of a warmer period, with temperatures continuing to rise until February before cooling down again.