The development of alternative energy sources is increasingly becoming a necessity. In this context, solar energy stands out because it is a renewable and low pollutant source of energy. The solar chimney uses solar energy to generate hot airflow that can be used to dry agricultural products or generate electric power. This paper presents an experimental study of the airflow inside a solar chimney. The tests were performed in a prototype built on the campus of Universidade Federal de Minas Gerais, with appropriate dimensions to dry agricultural products. The values of temperature, velocity, solar radiation, and humidity inside and outside the device were monitored over a nine month period, allowing the characterization of the airflow and the determination of the optical properties of the materials used.