Human Bioclimatology ‒ Bioclimatic Indices UTCI and PET in the Context of Climate Change ‒ Example of Banja Luka

Interpretation of bioclimatic conditions becomes more relevant in spatial planning, tourism, public health, sports events, etc. The study presents the general weather bioclimatic conditions in Banja Luka, defined on the basis of UTCI, PET, mPET indexes in order to show the pattern of each index in temperate climate and examine the annual and monthly differences of each index in the last sixty years. Monthly and annual indices were analyzed on the basis of 60 annual meteorological data by presenting the bioclimatic characteristics of the two reference periods 1961‒1990 and 1991‒2020 and the third sixty-year period 1961‒2020. Positive trend and increase in the value of all three indices for the periods 1961‒2020 and 1991‒2020 years indicate an increase in subjective heat stress and heat discomfort in Banja Luka.