The use of subfreezing temperatures is a reduced-risk and sustainable alternative to control stored-product pests in areas where winter temperatures permit. Diapausing insects are the primary source of infestations in stored grain during summer. Therefore, controlling these pests during winter may prevent early infestations the following year. Overwintering survival of stored-product pests depends in part on their cold hardiness and on the ability to seek physical protection from the surrounding habitat. Stored-product pests overwintering in the top section of grain-storage facilities generally tolerate a broader range of low temperatures than those overwintering within the grain mass. The Indianmeal moth, Plodia interpunctella, has been classified as one of the most cold-tolerant stored-product pests. Larvae exposed to field conditions can significantly depress their supercooling point (SCP) over time, often reaching the lowest SCP by late autumn. However, low SCPs will only confer a degree of protection from freezing temperatures in highly-fluctuating environments such as the headspace of grain bins. Overwintering mortality in P. interpunctella occurs primarily from the accumulation of chill injury at their overwintering sites. The rate at which mortality occurs during winter depends on grain temperature as well as the location and depth of the site chosen for overwintering. Therefore, a better understanding of the relationship between mortality of P. interpunctella and the temperature of exposure could facilitate the development of improved predictive tools that will aid in the control of this pest during winter months and to prepare plans to alleviate potential problems during the following season.