The climate of the Republic of Uzbekistan is located in a dry-hot climate zone, with hot summers and unstably cold winters. In the summer season, the maximum air temperature will rise to +43° +45°, in the south and desert zone of the republic to +47° +50°. In the deserts of the central regions, the annual precipitation is 100 mm, and in the mountains this figure exceeds 800 mm. Today, in Uzbekistan, over ten years, the air temperature has risen by 0.27°C and is rapidly increasing, the number of hot days and nights is increasing, sandstorms and winds are increasing. Therefore, the study of the influence of climatic conditions on the stress-strain properties of reinforced concrete elements not protected from sunlight is of great importance. In this article, comprehensive experimental research work was carried out to study the influence of natural climatic conditions on the stress-strain properties of heavy and light reinforced concrete elements. In this case, the influence of climatic conditions, daily and seasonal air temperature, and humidity changes on the properties of heavy and lightweight reinforced concrete was studied. A comparative analysis was conducted and conclusions were drawn