This paper concerns the vegetation period in 2005 in the Lublin region which was significant due to its large number of sequences of consecutive days with no rainfall, which caused serious shortages of soil moisture - mainly in summer and in the beginning of autumn. Analysis of the sum of temperatures and of the numbers of hot and very hot days was also carried out. The characteristics of the pluviometric conditions were presented using the Sielianinov hydrothermal coefficient. From among the 21 analysed decades, 14 had mean temperatures higher than the mean value in the period of 1951-2005. In 7 decades, no rainfall was recorded or the rainfall was classified as very low (0.1-1 mm/day). Quite favourable pluviometric conditions for the crop of winter cereals occurred in May. In the analysed period in Felin there were 7 series of consecutive rainless days lasting for 9 days or more, including 3 that lasted for 18 days or more. Based on the value of the Sielianinov coefficient it was possible to determine the period when the plants used twice as much water for evaporation than they received from rainfall. This period lasted from September 13th till October 19th.