Abstract: Climate change has become an important decision-making factor in today's social and economic development. Extreme weather disasters have brought more and more security problems to densely populated cities. To study the historical climate change characteristics and future trends of the Guangdong-Hong KongMacao Greater Bay Area, this paper uses the meteorological data of the Hong Kong Observatory from 1890 to 2020 and 7 stations in Guangdong Province since 1961 to analyze the overall characteristics of the temperature and precipitation in the Greater Bay Area. Using the observed data of the Hong Kong Observatory, the seasonal climate change characteristics and evolution laws were analyzed. Finally,the development trend of extreme weather(high temperature, drought and rainstorm) was analyzed using daily data. The analysis results show that the Greater Bay Area is facing a severe situation of accelerating temperature rise,the divergence of dry and wet seasons,and increasing extreme weather,which put forward higher requirements for the resilient development and emergency management of the urban agglomeration.