This study investigated the convective heat transfer from urban canopy and its dependence on urban parameters such as building coverage ratio and variations of building height. Wind tunnel experiments were carried out to roughly grasp the dependence of urban parameters on bulk heat transfer from urban canopy in a thermally stratified wind tunnel. However, it is not an easy task in wind tunnel experiments to evaluate local convective heat transfer coefficients, which vary with horizontal distance in the flow direction and also on individual surfaces of building roof, wall and ground. Thus, CFD simulation with a low Reynolds number k-ε model was conducted to accurately predict the convective heat transfer on these surfaces. Calculated CFD results for velocity and temperature profiles and bulk heat transfer from the urban canopy showed good agreement with experimental results. After this validation, the effects of urban canopy parameters (building coverage ratios and building heights) on local convective heat transfer coefficients on individual surfaces were investigated by CFD simulation. The results were generalized by the relationship between Rex (Reynolds number with which characteristic length X is the distance in the windward direction) and Nux (Local Nusselt number) for different cases of urban parameters. These effects of urban parameters on local convective heat transfer will be incorporated in the Urban Canopy Model in a mesoscale meteorological model for more precise prediction of urban heat island phenomena in the future.