It should be noted that the values of the reinforcement stationary potential and the concrete cover resistivity are only estimates of the probability of reinforcement corrosion risk in the investigated areas, and the measurement results are not meaningful. Corrosive current density data, on the other hand, allow for the estimation of corrosion activity in the reinforcement and prediction of its rate over time. The dynamic equilibrium on the electrode (reinforcing bar) immersed in the electrolyte (alkaline liquid filling the pores) has to be disturbed (polarization of the reinforcement) to conduct the measurements. In the case of the galvanostatic pulse method, a current of certain intensity generates such a disturbance. External factors, including electrolyte temperature, have some influence on the intensity of the process due to the fact that ions flow as a result of diffusion in the pore liquid, and thus also on the measured electrical values. As reported by [PERSON] [2], the diffusion coefficient (D) increases as the electrolyte temperature increases (3), which is directly related to the ion flow rate in the electrolyte and the measurement of this flow. In addition, the increase in temperature accelerates depolarization, which is important when galvanostatic pulse measurements are used. Although the galvanostatic pulse method has been used for several years [21; 22; 23; 24; 25; 26; 27; 28; 29; 30; 31], few authors have evaluated the impact of temperature on the measurement results [20; 23; 25; 28; 29; 30; 31]. Most research has been devoted to the impact of environmental conditions, i.e., both temperature and moisture content. Little or no information regarding the possible correlation between the temperature of the tested element and the obtained measurement results can be found in the literature, which suggests that it is not taken into account. The authors' previous research [21; 25; 28] prompted the thesis that the temperature of the tested element has a significant impact on the values of the measured parameters, which is also indicated by the physico-chemical nature of the reinforcement corrosion process in concrete. The results of measurements that were made on the same laboratory specimen, both outdoors in winter (in temperature of about 0 \({}^{\circ}\)C) and indoors at room temperature (about 23 \({}^{\circ}\)C), varied noticeably [25; 28]. Similar observations of differences in the corrosion rates between September 2000 and April 2001 were reported in [23]. For this reason, tests were carried out on a larger number of samples under gradually changed thermal conditions. The purpose of the work was to determine an influence of the temperature of the tested element on the measurement results of three parameters: the corrosion current density, the reinforcement stationary potential, and the concrete cover resistivity. The influence of temperature on the results of potential and resistivity measurements may result in incorrect marking of areas for advanced measurements and, as a consequence, disturb corrosion risk assessment, although measurements of stationary reinforcement potential and concrete cover resistivity are less important than measurements of corrosive current density in general GPM tests. Analysis of the values of these parameters allows for the estimation of actual steel reinforcement corrosion degree.