Station: Curtis, NE. U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991-2020). National Oceanic and Atmospheric Administration. [2021-12-10]. (原始内容存档于2021-12-11).
Station: Curtis, NE. U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991-2020). National Oceanic and Atmospheric Administration. [2021-12-10]. (原始内容存档于2021-12-11).