Changes in weather and climate are increasingly affecting our daily lives. Past experiences and habits, as well as some regulations that are still in place, are undergoing fundamental changes today. In addition to preventing further climate change and mitigating current impacts, there is a growing need to focus on building adaptive capacity. In Hungary, in the longer term, the sea-sons are likely to change, with more extreme summers and winters and shorter transition seasons. The factors defined in the current regulatory framework will become obsolete and may require more frequent review in the future. In addition, mechanical cooling is becoming more and more important, in addition to the former heating-centred mechanical systems, and even passive, architectural solutions may gain ground. The main goal is to look at the temperature and weather changes that have had the greatest impact on energy, both in the past and in the foreseeable future.