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Autumnal: Pertaining to the autumn season. The autumnal equinox occurs on or about Sept. 22 in the Northern Hemisphere and on or about March 21 in the Southern Hemisphere; contrast “vernal”.
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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.
