This article presents the results of climatological research about the number of summer days on the territory of the Republic of Moldova during 1960-2012, collected from 16 meteorological stations. For this analysis were used indexes such as: annual and multiannual regime, monthly regime, maximum and minimum number of summer days with the temperature ≥ 25 °C, being determined the regions of maximum and minimum intensity of the number of summer days. It was fixed the general tendency of increasing the number of summer days, correlated with regional and global climatic changes.