In the context of climate change, increasing emphasis is being placed on monitoring the occurrence of drought intensity as well as changes in temperature regimes and their impacts on forest ecosystem production. Norway spruce is one of the most endangered forest species due to the increasing frequency of dry periods. The diploma thesis is focused on the evaluation of the influence of environmental conditions on the stem circumference changes of Norway spruce (Picea abies L. Karst) during the period 2008–2016. The research was carried out at the study area Predmier (500 m a.s.l.), which is located in the Kysuce Protected Landscape Area (Western Beskids). The area was based on clones of Norway spruce obtained by autovegetative reproduction in 1989. On the monitored plots, the changes in trunk circumference were measured in 15 individuals (3 clones for 5 individuals) by means of dendrometers with continuous data recording, from which the increments on the perimeter of the stem were evaluated for individual years and months. There was evaluated the influence of meteorological and soil factors (precipitation, air temperature, soil water potential) on the growth response of Norway spruce during the monitored period. The increase in the stem circumference occurred mainly after precipitation. Conversely, it gradually shrunk during the rainless period. We did not find differences between spruce clones, because there were greater differences between individuals. The increment size was positively correlated with precipitation and negatively correlated with air temperature. The highest positive correlation coefficients with precipitation were reached in July during the culmination of growth. The highest negative correlation coefficients with air temperature were reached in July and August, when a significant increase in magnitude relationship with soil water potential values was also found.