Introduction. The analysis of long-term and intra-annual changes in surface air temperature at the regional level allows us to track longterm trends in global warming and climate change, and is the basis for decision-making in various sectors of the economy. Theoretical analysis. The modern trends were studied in the surface atmosphere and quantitative changes in annual and average seasonal air temperatures in the Saratov region in the 20th–21st centuries under changing climate conditions. The multiyear dynamics shows a continuous increase in temperature. In 1961–2020, the temperature increased on average by 0.4°C/decade. The intra-annual seasonal distribution of average temperatures shows an increase in all seasons of the year, but with predominance in autumn and winter. Conclusion.The analysis of spatial and temporal variability of air temperature in the Saratov region showed a steady increase: in 1961–1990 by 0.2°C/decade, in 1991–2020 by 0.7°C/decade. For the period 1991–2020, the average annual temperature values were: in Khvalynsk 6.8°C, in Balashov 6.8°C, in Saratov 7.2°C, in Yershov 6.5°C, in Aleksandrov Gai 7.8°C. The main contribution to the annual dynamics is made by more intense heating of the surface layer of the atmosphere in the cold half of the year.