"Station: Indian Dunes NL, IN". U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991-2020). National Oceanic and Atmospheric Administration. Archived from the original on June 2, 2021. Retrieved May 29, 2021.
"Station: Indian Dunes NL, IN". U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991-2020). National Oceanic and Atmospheric Administration. Archived from the original on June 2, 2021. Retrieved May 29, 2021.