The African continent, which has the lowest rate of greenhouse gas emissions, is presented as the continent most vulnerable to climate shocks. Madagascar, especially Mahajanga, is not immune to these problems. This is why we conducted this data analysis. Data collection took place at the Direction Générale de la Météorologie Malagasy and at the Agence pour la Sécurité de la Navigation Aérienne Mahajanga. The data were processed with SPSS 20 and STATISTICA 7 software. In Mahajanga, a disruption of these climatic parameters was observed. The analyses carried out inform us of a highly significant increase in temperatures and a progressive decrease in average rainfall, marked by a delay in the onset of the rainy season, and its early termination. Adaptation to climate change is an absolute necessity for Madagascar. Climate forecasts reflect a worrying increase in average temperatures of over 1°C and a decrease in rainfall of over 5% by 2050.