- 45 degrees.
Temperatures at all official global sites were checked -- including the North Pole, the South Pole, Siberia, Russia, the rest of the US, etc., and the coldest temperature recorded at an official weather monitoring/recording station was in Hettinger, ND.
Hettinger is in southwest North Dakota, near the South Dakota state line.
Note where the all-time lowest temperature for North Dakota for this date was recorded -- Parshall, ND -- the center of the Bakken.
Confirmed: not a single passenger death on a commercial JET aircraft anywhere on earth in 2017. First time in sixty years and a first since such aircraft became the dominant form of travel.