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September temperature drop: Chicago’s temperatures decline 10 degrees during the course of the month–1 degree every three days–from a normal high/low of 78(degrees)/59(degrees) on Sept. 1 to 69(degrees)/48(degrees) on Sept. 30.
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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.
