A Wind Chill Advisory is in effect for De Kalb, La Salle, Lee, Livingston, Ogle and Winnebago County until 9 a.m. Tuesday morning.
And by this time Tuesday night, it could be snowing-- just in time to give us a white Christmas.
"We are expected to have well below zero wind chill values," said meteorologist Stephen Rodriguez. "The wind chill values for the actual city, I would say, would be five to 15 below by this evening."
Rodriguez added the snowfall should not affect driving conditions.
There is a silver lining, however. The best chance for snow accumulation this week will be Tuesday night into Wednesday, according to the National Weather Service.
"It is looking very possible that we'll be having a white Christmas," Rodriguez said. "We should have snow throughout Christmas Eve and into Christmas Day."
The Sun-Times Media Wire contributed to this report.