There is substantial evidence that the global governance of climate change must pass through cities. While formal networks offer cities a means of generating effects that extend beyond their own borders, it remains unclear as to whether such networks can address collective action barriers and implementation gaps. City-networks, after all, are limited in their efforts to govern and must rely on information, service provision, and soft forms of coercion if they are to steer their members past these considerable challenges. This article contributes to extant efforts to assess their ability to do so by addressing two gaps in the literature. First, the article focuses on the Partners for Climate Protection (PCP), a city-network that has received little attention to date. Second, through analysis of two Canadian cities (Toronto and Winnipeg), the article provides an empirical illustration of the limitations of network authority and influence, and offers some thoughts on what this means for networked urban climate governance in Canada and beyond.