Summary:

The study characterizes extreme values of air temperature, which occurred in the Sudetes during the period 1951-2007. Analysis of data obtained from four reference stations confirmed warming progressing in our times in the entire height profile of the Sudetes (203-1603 m above sea level). The author presented upward trends of temperature almost in all months, however, not all of them were of statistical importance. The greatest increase in the maximum temperature was recorded in May (0.6ºC/10 years). Another significant sign of current warming is also the downward trend in the number of frosty days (Tmax<0ºC) and of very frosty ones ((Tmax<-10ºC) in the entire hypsometric profile, and a growing number of warm days (Tmax≥25ºC) and of hot ones (Tmax≥30ºC) in areas located in lower parts. At the turn of the 20th and 21st centuries, stations located at the foot of the Sudetes recorded the so-called particularly hot days, which had not been recorded before, with the maximum temperature exceeding 35ºC. Contemporary warming of climate in the highest part of the Sudetes (on Śnieżka) differs in terms of various thermal indicators from that in lower parts.