This article addresses the question of how ordinary cities, conceptualized here in a simplified way as peripheralized small and medium-sized cities, navigate (the complexities of) climate policy and planning. To do so, we elaborate on three temporal waves of trans-municipal environmental politics that have simultaneously shaped municipal climate politics in many places globally: (a) the Local Agenda 21, between 1992–2002; (b) the Transition Towns movement, between 2006 and 2015; and (c) recent climate emergency declarations, in place since 2016. Interestingly, the thousands of participating municipalities include not only the well-known frontrunners but also many small and medium-sized cities. Some have come into contact with climate and transformation issues for the first time, others have even been pioneers for much larger cities. However, the three waves also each have different characteristics in terms of underlying governance models, theory of change and scope of transition, role of planning and civil society, or output orientation. Through the combination of quantitative and qualitative methods, an overview of interlinkages between the three climate policy waves in German ordinary cities is compiled from publicly accessible databases. In addition, qualitative impressions allow for statements on the actors of this transformation processes, including municipal governments and councils, civil society organizations and social movements, various bridging agents, and trans-national municipal networks. This perspective on (referential and institutional) continuities is deepened in a case study on the medium-sized town of Marburg, Hesse. As participating cities in all three waves are predominantly located in the Global North, the article aims to also contribute to the application of the “ordinary city model” to regionally peripheralized cities in globally non-peripheral regions.