Arjona, Colombia experiences a warm and humid climate year-round. The dry season typically starts in January and ends in May, with temperatures gradually increasing throughout the period, reaching an average high of 36°C in May. June to August marks the beginning of the wet season, but temperatures remain relatively stable, averaging around 29°C. September to November sees a slight decrease in temperature, with the dry season returning in December. The overall temperature range is consistent, with minimal variation between seasons.