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The coldest temperature ever recorded in Chicago city limits is −27 °F (−33 °C) at O'Hare on January 20, 1985, [18] though unofficial temperatures as low as −3 °F (−19 °C) have been recorded at Chicago Aurora Airport in far western suburbs and in the rural areas to the west of Chicago. [43]
Under Köppen, Chicago is classified as a humid continental climate (Dfa). Deep within continents, cities like Chicago are defined by huge temperature swings from cold, snowy winters to warm summers.
The lowest temperature of −27 °F (−33 °C) was recorded on January 20, 1985. Along with long, hot dry spells in the summer, Chicago can suffer extreme winter cold spells. In the entire month of January 1977, the temperature did not rise above 31 °F (−0.6 °C). The average temperature that month was around 10 °F (−12 °C).
Extreme temperature changes can occur within minutes with the passage of a strong cold front through the state. On December 20, 1836, temperatures fell 40 °F or 22.2 °C in minutes, which supposedly froze people to their saddles and chickens in their tracks. [8]
Chicago was warmer than average during the 2022-23 season due to a La Niña climate system, which meant snow was scarce. Only 20.2 inches of snow fell at O’Hare International Airport, which is ...
The high temperature on Dec. 23, 2023, was 1 degree F below zero, followed by a low temperature of 8 degrees F below zero, the lowest temperature reading in the city since Jan. 31, 2019.
Climate data for Chicago (O'Hare Int'l Airport), 1991–2020 normals, [a] extremes 1871–present [b]Month Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year Record high °F (°C)
Decorative snowflakes for the holidays are pretty much the extent of the snow seen in Chicago so far this season. Chicago's snowfall drought has officially reached record status, and AccuWeather ...