Rio Grande do Sul has one of the strongest sectors of its development in agriculture, since, in addition to generating income and employment, it brings enormous returns in the added value of revenues and foreign exchange of exported products. Thus, studying the climatic influence in the primary tobacco sector can help mainly in the planning of more appropriate management of the culture for tobacco growers, thus increasing better quality production and thus also increasing the economic development of producing municipalities. part of the Alto Jacuí river basin. However, oscillations in production occur every year in Rio Grande do Sul's agricultural production, and one of the factors of greatest influence is the climatic factor. In this way the present work aims to analyze the relationship between climate and tobacco production in the Alto Jacuí / RS Hydrographic Basin. In order to carry out this work, we used synoptic charts to analyze climatic conditions, questionnaire application to two tobacco producers in the study region and also news reports on climatic adversities in the region. The results were quite satisfactory, since it was possible to identify the influence of climate on tobacco production in the Alto Jacuí / RS Hydrographic Basin
