This book deals with the construction of a Mini Meteorological Station (MEM), in which the sensors were programmed in Arduino and the data processing in Python. The MEM was used to measure temperature, relative humidity, illuminance and ultraviolet radiation in the municipality of Alegre and in the Sooretama Biological Reserve. The employability and reproducibility of the MEM Weather Station is aimed at educational and research applications, through effective instrumentation that is easy to reproduce and employ. It is also feasible to use it in studies in other areas of the natural sciences, given the accuracy of the results obtained in this work, as well as its ease of handling, portability and effectiveness. In addition to myself, former students Paulo Henrique Lorenzoni Filho and Rodrigo Leal Falcao were responsible for this work.