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Polar night: In polar regions, the portion of the year when the sun does not rise above the horizon. Its length varies from 20 hours at the Arctic and Antarctic Circles (latitude 66 degrees 33 minutes north and south, respectively) to 179 days at the poles.
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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.
