https://www.washingtonpost.com/weather/2019/01/30/chicago-faces-its-coldest-day-record-midwest-plunges-into-deep-freeze/?noredirect=on Midwest temperatures ‘could approach all-time record values’ Wednesday night] The Washington Post, January 30, 2019 The coldest wind chill was -66.0 Farad recorded at Ponsford.