The medical examiner's office announced on Tuesday the deaths occurred between 6 p.m. on January 31 and 11:59 p.m. on February 2 - the approximate time of the blizzard that buried northeastern Illinois in more than 19 inches of snow.
The office says nine of the victims were men and one was a woman. One victim was in his 40s, three were in their 50s and six were in their 60s. Nine died after shoveling snow and the tenth died after using a snow blower.
Three people died Sunday from snow shoveling related incidents in DuPage County, the coroner said.
All three were men in their early 60s who collapsed while shoveling snow at their homes.
They each transported to local hospitals, where they were pronounced dead from heart-related issues.
Much of the snow was heavy, wet snow, often referred to as heart attack snow.
The Associated Press contributed to this report.
VIDEO: Tips for safe snow shoveling