The specificity of the Karkonosze climate, standing out from other Sudeten ranges, it results mainly from higher altitudes, significant relative heights and the latitudinal position of the Main Ridge. The Karkonosze Mountains have a local mountain climate influenced by the features of the oceanic climate (atlantic). They characterize him: low air temperature in winter (winter is long and frosty, summer short and cool), frequent clouds (orographic barrier) and fog (especially in the peak games), high rainfall (one of the highest in the Sudetes), strong winds (phen type, blowing in spring and autumn, may exceed speed 100 km / h), significant fluctuations in air temperature during the day and throughout the year, sudden changes in the weather. It is typical too (in the case of mountain climates) variability of climatic elements with height above sea level.

There are four climatic floors in the Karkonosze Mountains: moderately warm (below 600 m n.p.m.) with an average annual air temperature above 6 ° C, moderately cool (600-960 m n.p.m.) with an average annual air temperature of 6-4 ° C, cool (960-1120 m n.p.m.) with an average annual air temperature of 4-2 ° C and very cool (above 1120 m n.p.m.), with an average annual air temperature below 2 ° C.

Climate affects elements of the environment: soil, vegetation and animals, and thus determines the course of the landscape levels in the mountains. The most significant influence of the climate on the world of animate nature manifests itself at the height of the upper edge of the forest, which in the Karkonosze Mountains runs at an altitude 1250 m n.p.m. (in the highest Polish mountains, Tatra Mountains, is it 1550 -1600 m!). Lowering the height of the landscape levels compared to the Tatra Mountains proves the harsh climate of the Krkonoše Mountains and the influence of oceanic features.