The paper consists of two parts. Part I contains a description of the climatic conditions of the Lublin Polesie region, carried out on the basis of measurements from stations, meteorological posts and IMGW (Institute of Meteorology and Water Management) precipitation posts. Most of the data used in the work covers the period of 1951-2000. Part 2 presents tendencies towards change of the selected climatic elements since the end of the 19^th century and in the second half of the 20^th century. The Lublin Polesie is distinguished by an access of solar radiation and real sunshine duration. The mean annual sums of these elements are among the highest as compared to other regions of Poland. Diversity of climatic conditions (including mainly sunshine duration, temperature, atmospheric precipitation and air humidity) over the area of the Lublin Polesie is relatively small due to the low hypsometric differentiation. Over shorter time spans (a month, a day), variation of some weather elements can be considerable. This concerns mostly atmospheric precipitation of the storm type and the occurrence of such phenomena as storms and fog. From the west towards the east, an increase in the thermic continentalism of the climate can be observed while the climate of the north-eastern part of Polesie belongs to the most continental ones in Poland. During the last several years, in the area of Polesie, a certain increase of the mean annual air temperature has been noticed connected with an increase in the mean temperature of winter, as well as an increase in the deficiency of air humidity with virtually unchanged water vapour pressure. Precipitation tendencies over the area of Polesie are not unequivocal. Over most of the area an increase in the annual sums can be noticed while in the northern and eastern part, a decrease has been observed.