Climate services are recognized as an essential tool for sustainable development in strategic and climate-sensitive sectors. In developing countries, particularly in Africa, the literature offers successful examples of application, especially in the agricultural sector, which is dramatically sensitive to climate variability and change. While, initially, particular emphasis was placed on the outcomes of these services and the benefits they provide to users, several authors, more recently, have focused their attention on the process. A climate service is understood as a cyclical process in which the different actors interact, exchange knowledge, and establish relationships and mutual trust. This co-production process serves primarily to bridge the gap between science and society and is particularly appropriate for developing countries. Several authors claim the benefit of the co-production process improving the service usability, but rarely the intrinsic value of the process is recognized. This study aims to describe the process and document its added value using the example of Niger as a case study, where two services addressing drought and floods have recently been developed, tested, and operationalized. This experience allows for inferring lessons that can be useful for researchers and practitioners in developed and developing contexts. The value of the collaboration between different disciplines (transdisciplinarity) and roles (complementarity), and the iterative and interactive learning process emerge as key elements allowing a continuous improvement of the services and the strengthened relationship among actors. The results of this process, albeit qualitatively described in the paper, could guide researchers and practitioners in adopting such an approach and could represent a tangible example for funders and policymakers of the process’s added value. Nevertheless, the article recognizes the need to develop a methodological framework for quali/quantitatively assessing the added value of the co-production process and suggests four dimensions to be considered in further research. Finally, the paper recommends the capitalization of pilot experiences through the national and global frameworks for climate services.