Environmental issues, in the context of climate change attracted the attention of researchers, government organizations and NGOs, which cooperate to find solutions on the greenhouse effect and decrease carbon dioxide in urban areas. Urban planning could play a key role in minimizing climate risks for the human environment. Bucharest is a very dynamic capital-city in terms of economy and demography and thus its urban extension, along new built-up areas and changes of land use/land cover, has a direct influence on many environmental issues, for example the variation of spatial distribution of temperatures. Over the past 30 years, the urban landscape in Bucharest has been changing as new elements were newly constructed or transformed: numerous residential neighbourhoods in the city and mostly in its peripheral areas, vast commercial areas, business centres, etc. The main objective of this research is to demonstrate the relationship between land cover/land use classes and temperature variations, identified by satellite imagery. Therefore, satellite imagery provided by Landsat 5 TM, Landsat 8 OLI/TIR, Sentinel 1 scenes acquired from the years 1990, 2000, 2007, 2015, 2016, 2017, 2018 were selected for this study. The spatial resolution is 30 m for Landsat images in order to demonstrate the correlation between land use/land cover changes and LST estimation. A multi-temporal analysis was also conducted. Nowadays, high-resolution satellite imagery may contribute greatly to the monitoring of green spaces, saving time and money.