What is the lowest temperature ever recorded in Chicago Illinois?

The highest temperature ever recorded in Chicago is an unofficial 109°F (44°C) on July 24, 1935. The highest official temperature ever recorded is 105°F (41°C) on July 14, 1995 during the Chicago Heat Wave. The coldest temperature ever recorded in Chicago is -27°F (-33°C) on January 20, 1985, with a wind chill of -83°F (-64°C). On December 24, 1983, the high temperature at Chicago reached only -11°F (-23°C), and on July 30, 1916, the low temperature sank to only 84°F (29°C), both of which are records.