Station: Vandalia, MO. U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991-2020). National Oceanic and Atmospheric Administration. [2021-07-22]. (原始内容存档于2024-04-21).
Station: Vandalia, MO. U.S. Climate Normals 2020: U.S. Monthly Climate Normals (1991-2020). National Oceanic and Atmospheric Administration. [2021-07-22]. (原始内容存档于2024-04-21).