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The air temperature (tair) exerts great influence on the development of poultry during their heating phase. Therefore, the aim of this study was to analyze the structure and the magnitude of the tair spatial variability, using geostatistics tools such as semivariogram analysis and also producing kriging maps. The experiment was conducted in the west mesoregion of Minas Gerais State in 2010, in a commercial broiler house with heating system consisting of two furnaces that heat the air indirectly, in the first 14 days of the birds life. It was possible to characterize the variability of the tair, which allowed to observe the spatial dependence by using geostatistics techniques. In addition, the use of geostatistics and distribution maps made possible to identify problems in the heating system in regions inside the broiler house that may harm the development of chicks.