This course material, titled "Hydroclimatology" is intended for first-year Master's students in Hydrogeology, within the training area of ​​Earth and Universe Sciences (STU) at the Faculty of Nature and Life Sciences (SNV) of Mustapha Stambouli University of Mascara. This document aims to provide students with an introduction and in-depth analysis of fundamental concepts and phenomena related to Climatology. It is organized into seven (7) chapters: the first chapter deals with the atmosphere and its gaseous composition. The second details solar radiation and radiative balance. The third describes atmospheric and oceanic circulations. In the fourth chapter, atmospheric and oceanic circulations are explained exhaustively. The fifth and sixth are devoted to the study of climate and evapotranspiration. Finally, and in the last chapter, the document reserves a place for climate change and its impacts.