Results of local-scale surface energy balance observations reveal that latent heat fluxes, Qe, provided by trees are important in the surface energy control of cities. Arboreal species provide different storage latent heat, a characteristic related with the mitigation of air temperature in local-scale provided by them. The aim of this work is to compare heat fluxes in different arboreal species ... [Show full abstract] along the day and verify their contribution for thermal comfort inside and outside buildings. The required data are: net radiation flux density retained by sunlit and shaded layers (W/m 2) (collected by tube solarimeters), air temperature and relative humidity, atmospheric pressure and vegetation phenology (size of crown, leaves and foliar area). The measurements were carried out during the day, from sunrise to sunset, in three-day periods, throughout the year, covering different seasons. The energy balance scheme is based in the big-leaf model by Penman-Monteith (FAO056). In the research four tree species were analyzed, chosen from the most used trees in urban forestry in the South-East region of Brazil. Results showed that Qe by each trees varied between 116, 68 and 1208,89 W.h/m 2 during the year. The greatest contribution of trees for the energy balance was observed in the afternoon period. The different results obtained were due to the characteristics of the sample individual, such as structure and density of the treetop, size, shape and color of leaves, tree age and growth stage. Trees with higher tops have a good contribution in the cities, due to their energy consumption and higher solar radiation attenuation. Deciduous species are excellent in sub-tropical climate, because they can reduce heat fluxes in summer and allow them in winter. The trees around building, on streets and parks can reduce air temperature, by diminishing the conductive and convective heat gains. This effect provides thermal comfort and can reduce the energy for cooling of the buildings. These characteristics of vegetation should be taken in account by professionals of the urban built environment to improve thermal comfort outdoors, reducing the effect of heat island so ensuring better quality of life for people.