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Chicago’s 90 (degrees)-plus days: They occur more frequently on July 20 than on any other day of the year. At Midway Airport, readings of 90 (degrees) or higher have been logged on 30 out of 78 years (1928-2005 data).
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Tom Skilling is chief meteorologist at WGN-TV. His forecasts can be seen Monday through Friday on WGN-TV News at noon and 9 p.m.
WGN-TV meteorologists Steve Kahn, Richard Koeneman and Paul Dailey plus weather producer Bill Snyder contribute to this page.
