Winds are expected to be heavy, up to 30 mph with gusts of as quick as 45 mph, affecting visibility. The Chicago White Sox postponed Monday's season opener against the Kansas City Royals until Tuesday because of the snow forecast.
Flurries and unseasonably cold temperatures are forecast to continue into Monday.
The sleet and snow have also made roads in the Chicago area slick.
The Illinois Department of Transportation had many of its plows out on expressways Sunday night, and Chicago's snow command assigned 75 snow-fighting trucks to patrol the city's main route system. The trucks are focusing on major streets, including Lake Shore Drive and bridge decks and overpasses, which get cold quickly.
(The Associated Press contributed to this report.)