Climate change presents one of the most complex global challenges, requiring urgent and collective action due to its intergenerational impacts, high risks, and uncertainties. Addressing climate change also contributes to solving broader environmental issues such as pollution, deforestation, and biodiversity loss. At the same time, persistent poverty and inequality further complicate global development goals. As those most affected are often the poor, effective climate action must be both environmentally sustainable and socially equitable. This calls for robust monitoring and evaluation to ensure limited resources are used efficiently and impactfully. Evaluating Climate Change Action for Sustainable Development brings together interdisciplinary insights and field-based evaluations to support informed decision-making. The book highlights the critical role of evaluators in generating evidence, measuring results, and driving meaningful learning for sustainable transformation. It emphasizes that strategic, informed actions can lead to a more resilient, low-carbon future for current and future generations.