Chicago, Ill. – A messy mix of freezing fog and accumulating snow is creating hazardous travel conditions across northern Illinois Monday, with the worst impacts expected during the afternoon and evening commute. Snow will overspread the region from west to east, bringing 2 to 4 inches south of Interstate 80 and 2 to 3 inches to areas north, including Chicago and Rockford.
According to the National Weather Service in Chicago, fog may become dense through early morning, especially south of the city, reducing visibility and causing slick spots on untreated roads. By afternoon, snow will intensify, leading to slowed travel and reduced visibility through late evening before tapering off after midnight.
Drivers are urged to allow extra travel time and check conditions before heading out, particularly along I-55, I-80, and I-57 where snow rates may briefly reach moderate intensity.
The region will remain in a wintry pattern through the week, with additional snow chances returning Wednesday and Friday. The coldest air of the season arrives midweek, dropping daytime highs into the teens and single digits and wind chills as low as 15 below zero by Thursday morning.
Five-Day Forecast for Chicago, Illinois:
Monday: Snow developing late; highs 25–30°F, lows near 20°F.
Tuesday: Partly cloudy and cold; highs 22–27°F, lows 14–19°F.
Wednesday: Snow chances late; highs 30–33°F, lows -6–12°F; wind chills -5 to -15°F.
Thursday: Bitter cold; highs 8–19°F, lows -8–4°F; wind chills -10 to -15°F.
Friday: Mostly cloudy with 20–30% snow chance; highs 20–26°F, lows 12–19°F.
