December 15
- 1893 – Three strong tornadoes (two F2, one F3) touched down in Arkansas. The F3 tornado killed four people in the destruction of sevel homes south of Camden. An F2 tornado killed a child near Magnolia.
- 1998 – An F2 tornado hit Umtata, Eastern Cape, South Africa, causing significant damage to several buildings with roofs and walls torn off. Eleven people died when the wall of a bus station collapsed.
- 2021 – A derecho spawned 120 tornadoes across Nebraska, Iowa, Minnesota, and Wisconsin, the largest December outbreak on record; 29 tornadoes were rated EF2. This outbreak marked the first time that tornadoes were recorded in Minnesota in December.