The first April snow in the Chicago region in three years is expected to fall by the Monday evening rush.
Temperatures are forecast to steadily fall throughout the day, from an early morning high in the 60s to the low 30s by mid-afternoon.
The precipitation is expected to start as rain and transition to snow by late afternoon, National Weather Service forecasters said. The snow is expected to continue through mid-evening, with the potential for times of modest snowfall rates.
Accumulations of an inch to slightly higher are possible, mainly on grassy surfaces. Minor, slushy accumulations on roadways are possible, forecasters said.
The snow could slow evening commute times due to minor accumulations on roadways and reduced visibility.
The National Weather Service said the last April day with accumulating snow in Chicago was April 18, 2011 when .6 inches of snow was recorded at O'Hare International Airport.
Tuesday is expected to remain chilly with a high of 41 degrees. Spring-like temperatures are forecast to return on Wednesday, with a high of 52 under sunny skies.