In the course of the study, the spatial and temporal distribution of agricultural fields land surface temperature assessment was made. The object of the study is agricultural fields (barley, oats, fallow field, perennial grasses (Onobrychis)), located on the territory of the Krasnoyarsk Research Institute of Agriculture of the FRC SB RAS near the Minino village (Central Siberia, Krasnoyarsk region). The objects land surface temperature measurement was taken by the ZENMUSE XT2 camera installed on a DJI Matrice 210 RTK V2 unmanned aerial vehicle. The obtained thermal maps spatial resolution is 12 - 14 cm. The state of the objects under study (the presence of vegetation cover) was assessed using the NDVI values ​​obtained from the PlanetScope satellite data with a spatial resolution of 3 meters. It was established that the presence of plants and the size of their projective cover are decisive in the formation of soil cover temperature conditions. The growth and development of the vegetation cover, its height and closeness, change the temperature regime conditions. Instead of a soil cover, vegetation becomes an active surface. The thermal maps (spatial distribution of land surface temperature) of the agricultural land surface has been carried out, which makes it possible to assess the in-field objects under study temperature heterogeneity.