This paper presents the realization of a study of monitoring and data analysis using humidity and temperature data loggers in a biodiversity hotspot of the Atlantic Forest in southeastern Brazil. The study was carried out with students from the José Pinto Coelho State School of Elementary and Secondary Education who collected data from their homes located in different regions of the Municipality of Santa Teresa, found 80 km from Vitória, capital of the State of Espírito Santo. It had the participation of 84 students from three classes of the 1st year of high school. It aimed to introduce them to the practice of citizen science, seeking to promote understanding of how they can use accessible technologies to monitor local environmental conditions and contribute to studies on climate change. The study consisted of workshops focusing on the production of data loggers, the importance of preserving the Atlantic Forest, how climate change affects this ecosystem and collecting and analyzing data with data loggers. The results reveal that students were engaged in the proposal of citizen science, showing an understanding of environmental issues, and in the bid to use digital technologies and programming as a tool for data collection and analysis.