This document provides climatological information required for the long term planning of flight operations at the airport of Geneva. The report is divided into two parts. In part A the the important meteorological patterns of the region are introduced. The second part B presents the data in forms of tables and graphics, allowing a direct view of the information. The statistics were generated from recorded data, following the ICAO recommendations on aeronautical climatological information (Convention on International Civil Aviation, Annex 3).