This data comprises of raw and processed environmental data, climate, weather and cultivation area, for corn yield prediction in Sub-Sahara Africa, with emphasis in Nigeria. The data was collected for predicting crop yield with the sole purpose of designing a decision support system to help smallholder farmers to determine how the conditions at a given farm will affect yield positively or negatively. However, the data can serve several other purposes via analysis, interpretation or defining food security and policy design. Therefore, researchers are welcome to use the data as they deem fit, but we request that the original work for which the data was collected and used be cited.