The CLIM´PY project aims to determine the evolution and climate trends of the Pyrenees in the context of global change, considering these priority actions: creation of a comprehensive temperature, rainfall and snow database which will be quality controlled and homogenized; the development of climatic indicators in order to perform a complete diagnosis of the trends observed and will be updatable within the framework of the OPCC; to analyze the distribution of the snow cover and its spatial and temporal variability, finally, the developing of regional climate projections in order to implement policies for adapting to climate change. CLIM´PY proposal gives continuity to the climate action of the OPCC-EFA235/11 project, and relies on the cooperation established between the main research centers on both sides of the Pyrenees. At the same time, it fits the need to offer a long-term, updateable initiative that will enable the possibility to perform useful wide projection of future climate diagnostics. The results are intended to contribute to the development of the strategy and plan of OPCC action. In addition, they will provide knowledge that enables to assess impacts on the territory (water resources, ecosystems, biodiversity, tourism, energy, etc.), and consider options for adapting to climate change.