Having an accurate corn yield prediction is useful because it provides information about production and equilibrium post-harvest futures price prior to harvest. A publicly available corn yield prediction can help address emergent information asymmetry problems and, in doing so, improve price efficiency on futures markets. This paper is the first to predict corn yield using Long Short-Term Memory (LSTM), a special Recurrent Neural Network method. Our prediction is only 0.83 bushel/acre lower than actual corn yields in the Corn Belt, and is more accurate than the pre-harvest prediction from the USDA. And more importantly, our model provides a publicly available source that will contribute to eliminating the information asymmetry problem that arises from private sector crop yield prediction.