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Participatory Integrated Climate Services for Agriculture (PICSA) is an approach that has been used to date in 20 countries and benefited tens of thousands of households including over 5000 in Northern Ghana and 75,000 in Rwanda. PICSA involves trained field staff or community volunteers working with groups of farmers and includes farmers: using both historical climate information and forecasts; exploring practical options to address challenges and; using participatory decision making tools to evaluate and plan options for individual farm contexts. A survey of randomly selected farmers and detailed case studies was used in Northern Ghana to investigate the influence of PICSA on farmer’s decision-making, livelihoods, and innovation behaviours. Ninety seven percent of farmers had made changes to their practices (mean of three per farmer), including starting new enterprises and a wide range of management …