The Urban Multi-scale Environmental Predictor (UMEP) is a climate service tool, designed for researchers and service providers (e.g. architects, climatologists, energy, health and urban planners). This GIS-based open source tool can be used for a variety of applications related to outdoor thermal comfort, urban energy consumption, climate change mitigation etc. UMEP consists of a coupled modelling system which combines “state of the art” 1D and 2D models related to the processes essential for scale independent urban climate estimations. More information can be found at http://www.urban-climate.net/umep/UMEP.