In the context of the most accurate measurement of the displacements of engineering objects, a preliminary correlation was made between GNSS measurements and changes in ground humidity. GNSS measurements were made in the center of Wrocław on four benchmarks at important existing investments. The influence of the geological structure of the investment area was analyzed, which corresponded to changes in humidity and the displacements of benchmarks. It turned out that there is a preliminary correlation between benchmarks located in geologically unstable areas and the humidity of these areas. It results not only from statistical analyses, which was presented in the previous article. The correlation of displacement values with respect to the change in moisture content of cohesive soils such as clays has been shown. This can improve the accuracy of measurements of displacements of engineering structures located on cohesive and organic soils. Then, changes in the temperature of the soil medium also occur. This relationship requires more detailed investigation.