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Winter Begins Dec. 21 at 10:03 a.m. ET as Midwest Braces for More Cold and Snow

Meteorological season is already underway, and even as daylight soon lengthens, temperatures typically fall further because land and oceans respond slowly to changing sunlight.

Overview

  • Time and Date pinpoints the astronomical start on December 21 at 09:03 CST (10:03 EST), marking the Northern Hemisphere’s shortest daylight.
  • After recent snow in Chicago and Cook County, the National Weather Service expects below-normal temperatures in Illinois from Thursday to Saturday with another round of snow possible this weekend.
  • Meteorological winter, used for climate tracking, began on December 1 and runs through the end of February.
  • Long-range guidance cited by MySA from the Old Farmer’s Almanac suggests chances for rain and snow in parts of Texas in mid-December and in the days just before Christmas, which is not an official forecast.
  • Chicago is forecast to see only 9 hours, 7 minutes and 44 seconds of sunlight on December 21, a result of Earth’s axial tilt that drives the seasons.