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An hourly dataset of Automatic Weather Stations over Beijing Municipality is developed and employed to analyze the spatial and temporal characteristics of Urban Heat Island Intensity (UHII)over the built-up areas.A total of 56 stations being located in the built-up areas (inside the 6th Ring Road (RR)) are considered as urban sites and 8 stations in the suburban belts surrounding the built-up areas are taken as reference sites.The reference stations are selected by using a remote-sensing method.The urban sites are further divided into three areas based on the city RRs.