"Station: Lead, SD". U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991–2020). National Oceanic and Atmospheric Administration. Archived from the original on October 28, 2021. Retrieved October 28, 2021.
"Station: Lead, SD". U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991–2020). National Oceanic and Atmospheric Administration. Archived from the original on October 28, 2021. Retrieved October 28, 2021.