"Congrats" #Chicago-ans, you just lived through the coldest first half of November in the past 148 years! The average temperature from Nov. 1-15 was 31.2°, with the previous record cold (since 1871) first half of the month in 1991 (average temp of 31.4°). #ilwx

— NWS Chicago (@NWSChicago) November 16, 2019