On Sunday, the temperature in New York City’s Central Park hit 67 degrees—the warmest Dec. 13 since 1923. Manhattanites practiced yoga outdoors and ice-skated in short sleeves. The Yuletide heat wave was even more impressive elsewhere, breaking some of the longest-standing American temperature records, some dating back 142 years. Greenwood, Mississippi, hit 83 degrees. Even the self-described “icebox of America,” International Falls, Minnesota, has had a mild start to the winter season: The high temperature there has dipped below the freezing mark only once so far this month—about 20 degrees warmer than a typical first half of December.
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