As municipalities are increasingly expected to raise the level of ambition of their climate effort, it is vital that climate action pervades the entire organisation across departments and sectors. This way, a holistic climate effort is organised, in which synergetic climate potentials are explored. However, municipalities experience a lacking ability to coordinate a plurality of climate projects, which makes it difficult to assess the degree, to which the effort coheres with overall policy objectives. Using this challenge as a starting point, this thesis examines the reasons behind the shortage of coordination, on the ground of which suggestions are proposed to improve the conditions for coordinating a cross-sectorial climate effort. The empirical object is limited to five municipalities in Northern Jutland, in which a series of interviews with mayors and planners constructs a methodological foundation and shapes a theoretical framework. By positioning the project within the tradition of transitioning from government to governance and actor-centred institutionalism, focus is directed at the structural approach to steering. It is concluded that a transition from vertical interaction flows in hierarchical organisational structures towards horizontal collaborations in loosely-coupled governance networks would add flexibility to municipalities and enable them to coordinate a cross-sectorial climate effort in an ever-changing society.