The Global Framework for Climate Services provides the following definition:
Climate services provide climate information to help individuals and organisations to make climate smart decisions.
In the European Roadmap for Climate Services it is defined as:
the transformation of climate-related data — together with other relevant information — into customised products such as projections, forecasts, information, trends, economic analysis, assessments (including technology assessment), counselling on best practices, development and evaluation of solutions and any other service in relation to climate that may be of use for the society at large. As such, these services include data, information and knowledge that support adaptation, mitigation and disaster risk management (DRM).