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Chicago has a climate typical of the U.S. Midwest . Sudden changes of weather, large daily temperature ranges, and unpredictable Precipitation patterns are all staples of Chicago weather. Chicago has four clearly defined Season s, although in certain years some seasons may overextend their welcome and linger into months they do not traditionally occupy. For example, in Chicago it has snowed in September ( 1942 ), been 90°F (33°C) in March ( 1982 ), and had a day where the high and low temperatures differed by more than 65°F (31°C) in one day ( February 8 , 1900 ). In a typical Chicago until 1965 . In 1965 August inexplicably overtook July as the wettest month, and it remains wetter than July to this day. Winter in Chicago is a variable and fickle season. The average Chicago winter produces 37.0 inches (940 mm) of Snow . This number can prove unreliable, as Chicago winters have produced between 9.8 and 87.0 inches (249 and 2210 mm) of snow. Snow tends to fall in light accumulations of around 2 inches (50.8 mm), but about once per year Chicago experiences a storm that can produce 10 to 14 inches (254 to 356 mm) of snow in one day. Temperatures can vary wildly within the span of one week, but extended periods of temperatures below 32°F (0°C) are not uncommon in January and February. The temperature in January averages about 25°F (-4°C) in the afternoon, and 10°F (-12°C) at night. Temperatures can be expected to drop below 0°F (-18°C) on 15 days throughout the winter season. Although rare, temperatures in Chicago even in the middle of winter can reach 50°F (10°C). 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 (42°C) on July 17 , 1995 during the Chicago Heat Wave . The coldest temperature ever recorded in Chicago is -27°F (-33°C) on January 20 , 1985 . 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. Although Chicago is known as the Windy City , it is not significantly breezier than other American cities. Average wind speeds range from 8 mph (13 km/h) in late summer to 12 mph (19 km/h) in spring months. Until recently, the "windy city" moniker was believed to be a derisive reference to Chicago's politicians, coined in a New York newspaper editorial in 1890. New research by OED consultant Barry Popik has shown that the term actually appeared in print several years before the New York editorial. The phrase may have been created by Chicago tourism boosters attempting to promote the city, cooled by breezes off Lake Michigan , as an ideal summer destination. According to the . |
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