The presented disertation is focused with its aims on the topic associated with the ongoing climate change in recent years. Increasing number of fires in the world as well as in Europe stimulates the need to deal with issue of analysis the meteorological conditions of forest and landscape fires in the Slovak Republic. The main research aim has been investigating the impact of meteorological conditions on the development of fuel moisture content which is an essential material for the creation and spread of fires. The proposed methodology of obtaining the necessary information about condition and fuel reaction was based on problem analysis of meteorological elements, fires and fuels. As a key research objects have been selected the forest stands of pine (Pinus sylvestris) and forest beech (Fagus sylvatica). We monitored the evolution of fuel moisture content in the period June – October 2017 using the ME 2000 fuel moisture meter. The results had showed the fuel reacted to meteorological changes much faster than was expected. The rate of change in moisture content depends on the type of wood and in particular its chemical composition influences the rate of change in moisture. The measured values of moisture content were evaluated from the aspect of their correlation with fire indices. The most significant fire index has been the Angstrom Index. The second part of the work deals with trends in fire indices. Likewise, the processed results showed as the most significant trend, of increasing number of days with fire danger, the Angström Index. The measured research data have been the presumption for creating models to determining humidity in the fuel. Due to the large differences in moisture content, we have created models for each wood species separately increasing its scientific value. In the end we evaluated the impact of the expected climatic change on the Climate Fire Index (CFFI). The final presumption/assessment of our results (using the CCSM4 model and the RCP 4.5 scenario) indicate that by the end of the century we can expect a 50% increasing fire dangers.