The main aim of this work was to determine the changes of meteorological conditions in Poznań, Poland, in the period 1848-2009. The onset of the analyzed period coincides with the launch of conducting instrumental meteorological measurements in Poznań. Professor Smosarski’s analyses and data were taken into account for the examination of the period 1848-1922, while data from NOAA and the Meteorological Yearbooks were applied for the years 1960-2009. It has been concluded that the mean annual temperature for the period 1848-1922 was 0.9°C lower than for 1960-2009, while for 2000-09 it was as much as 1.9ºC higher. It also has been established that a period without ground frost incidences was prolonged and the frost season shortened. Koeppen’s criterion was used to determine the frequency of the conditions leading to landscape stepping.