This study actually presents a statistical analysis of maximum precipitation amounts at different time intervals in Dobrogea historical region, spanning over the whole historical period of measurements available for each meteorological station taken into consideration. The data provided by the National Meteorological Administration have different time spans for each weather station, starting with 1948 (at Constanța weather station). Two methodologies were used for data recording: the pluviographs during the last century, and the automatic weather sensors, which have been more recently introduced into general use, respectively. In this study, a sub-hourly temporal scale was used to estimate extreme rainfalls: 5, 10, 15, 20, 25, 30 minutes. Then, the corresponding evolution trends were calculated over the entire period of reference, with the Mann-Kendall Test being applied to estimate their statistical significance. The probability for extremely high precipitation amounts to occur in very short periods of time and consequently, the resulting rainfall intensities have also been computed by means of the Generalized Extreme Value distribution. The findings show that, despite the general scarcity of rainfall amounts, mostly due to prevalent mid-latitude semi-arid conditions (the annual rainfall amounts in Dobrogea hardly exceeding 400 mm/year), when occurring, they are very heavy, mounting up to 20 mm in 5 minutes.