Analyses of climate measurement series from Rwandan weather stations revealed that the division into the four formerly described Rwandan climate zones is not correct any more. This could be shown in a more detailed analysis based on currently available data. In the course of discussions held with the Service Meteo Rwanda it emerged that the climate charts used in Rwandan atlases and school books are based on data covering the period from 1931 to 1960. Fortunately, since then a mass of new data have been collected, which, however, until now have only been evaluated in isolated instances for a specific local as needed. This led to the initiation of the ReCCiR project. The project’s aim was to conduct a regional climatic analysis covering all of Rwanda and visualizing it on new maps.