In practice, the propagation of electromagnetic waves is used in a large number of telecommunication wireless systems (e.g., satellites, radar, mobile phones, etc.). Since 2010 the Kielce University of Technology has been a member of a project focused on COST Action IC0802 – Propagation Tools and Data for Integrated Telecommunication, Navigation, and Earth Observation Systems. The main scientific objective was to analyze the impact of weather conditions on the quality of satellite transmissions. This article presents part of the results of that project for frequencies between 26 GHz and 50 GHz. This information may be useful for ensuring the proper reception of microwave satellite signals and to minimize the risk of lack of communication due to adverse weather conditions.