From November to the end of the third Thursday of December, the temperature dropped in all four observed cities as the winter storm Cleon and Gemini dumped several inches of sleet, ice, and snow on much of the country. The monthly average temperature plunged in Sacramento by six degrees Celsius to 7C, in Chicago by nine degrees to -8C, in Raleigh by three degrees to 7C, and in New York by six degrees to 1C. In the last month of the year, the city of Chicago shivered in an early winter freeze as the average temperature felt like -13C from December 5 to December 18, 2013.
This year’s early winter turned out to be below the two-year average in December. Comparing the past two-year average of December temperatures to December 2013, this year felt colder than the two-year average in the observed cities, as the temperature was lower in Sacramento City by 1 degree Celsius, in Chicago by 7 degrees, in Raleigh by 2, and in New York by 4 degrees.