A dataset simulated by a regional climate model coupled with an urban canopy model and building energy model (WRF–CM–BEM). The study area was the Tokyo Metropolitan Area, Japan and the simulation period was summertime in 2017 (from 00UTC 25 June to 00UTC 01 September). This dataset includes model output (electricity consumption (EC) and near-surface air temperature) and model grid information (e.g., longitude, latitude, and land-use index) as netCDF files. There are two files: an improvement case (CASEnew.nc) and another case without improvements (CASEold.nc).