Post-harvest losses of fruit and vegetables are significant in sub-Saharan Africa due to a lack of suitable storage facilities in production areas. This work aims to contribute to the fight against post-harvest losses by developing a bioclimatic warehouse model. A 3D model of the bioclimatic warehouse was created using the open-source software EnergyPlus, coupled with OpenStudio and Google SketchUp. This model was validated by comparing its results with data measured on site in Toubab Dialao, Dakar. The results of the study show that the bioclimatic warehouse reduces interior heat by 35% compared to the exterior and shifts the heat wave by two hours. The envelope effectively regulates the interior relative humidity, which remains within the recommended range for storing onions.