The Russian Federation in recent years has become a world leader in the production of grain crops. A significant contribution to increasing the volume of harvesting is made by the regions located in the European part, in which the leaders in the production of grain and leguminous crops are the Voronezh, Lipetsk and Kursk regions. The growth in the production of grain and leguminous crops in these areas was facilitated by state support for agriculture, black soil, favorable climatic conditions, etc. But weather conditions do not always contribute to the annual collection of record harvests. To assess the degree of influence of weather conditions on the yield of grain and leguminous crops, it is necessary to analyze the relationship between agro meteorological characteristics and annual yield indicators for the period from 2013 to 2018. The results obtained in the future will make it possible to refine the methods for forecasting agro meteorological resources for the growing season and, accordingly, forecasting the future harvest.