Purpose: Climate change is the most crucial environmental problem confronting society and results in a bigger adverse consequence on crop yield and returns to farmers. This research work examined the effects of climate smart agrarian practices on arable farmers’ returns in Iwo ADP zone of Osun State, Nigeria.Research Method: The information was gathered utilizing organized survey from a sum of 120 arable crop growers in the zone under review. A multistage sampling procedure was taken on for choice of arable crop farmers for the research. The information gathered was dissected applying descriptive statistics, farm budgetary techniques, and multiple regression analysis.Findings and Values: The findings of the research gave information that the mean age of the farmers was 52.4 ± 6.5 years. The typical acreage under cultivation was 3.7 ± 1.2 hectares, and the following climate smart agricultural practices were the most employed grounded on their Weighted Mean Score (WMS) practices among the farmers; intercropping (2.1), crop rotation (2.1), and integrated pest management (2.0). The regression results showed that age (1%), periods of formal schooling (1%), farm size (5%), years of climate smart agricultural practices (1%), and expenses on agrochemicals (1%) influenced farmers’ income in the study area.