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.