The yield and chemical composition of cow’s milk, also, the quality of milk and dairy products vary
seasonally throughout the year, depending on the diet, or season. The influence of the season,
relatively winter and summer, on certain important biochemical components and physical properties
of milk in Southern Serbia was studied in this paper. The obtained data were processed by standard
variational-statistical methods. Based on the obtained results of the research, it can be concluded that
all the obtained results are following the literature as well as the valid legal norms. It was noted that
there is a significant difference in quality between winter and summer milk, while variations between
quality at purchase points are inappreciable. Generally, the acidity of milk is higher in the summer,
while the dry matter content, as well as the added water content, is higher in the winter.
