This paper presents thermal-precipitation regionalisation for Poland employing the Shmuck method. The regionalisation has been carried out for three separate periods: 1961-1990, 1971-2000 and 1991-2000. The authors distinguished 3 thermal regions based on temperature sums ≥10.0ºC: very warm >3000, warm 2750-3000 and temperate warm <2750, as well as 4 precipitation regions based on the so-called precipitation index (J): very dry <50, dry 50-100, temperate humid 100-300 and humid >300. Comparison of the above-mentioned regionalisations clearly indicates a gradual decrease in the surface area for the temperate warm region that includes both Baltic Seashore and Baltic Lakeland districts. This decrease for subsequent time periods was as follows: 34%, 28% and 9%. During the last decade, a very warm region has appeared in southwestern Poland. This region had temperatures sums in the range 3000-3200ºC and possessed various humidity levels. The increase of the areas of the dry and very dry regions with precipitation index values <100 during the three time periods was statistically insignificant.