Chicago, Illinois – A colder, snow-favored weather pattern is becoming more likely across northern and central Illinois late next week, with increasing confidence that snow will be more common than rain between Jan 20 and Jan 26. While individual storm systems remain uncertain, the broader setup supports multiple chances for snowfall across the region.
According to the National Weather Service and the Climate Prediction Center, Illinois is included in an area with a 40 percent chance of above-normal precipitation during the 8–14 day period. Temperature trends during that same window increasingly support colder air holding across the Midwest, shifting precipitation odds toward snow rather than rain for much of northern and central Illinois.
Northern Illinois, including Chicago, Rockford, Waukegan, and DeKalb, appears especially favored for accumulating snow. Systems tracking through the Great Lakes could bring repeated rounds of light to moderate snow, with colder air allowing snow to persist during overnight and early morning hours. Lake-enhanced moisture from Lake Michigan may add localized intensity at times, particularly north and east of Chicago.
Central Illinois, including Aurora, Joliet, Bloomington, Peoria, and Springfield, also shows a growing snow signal. While daytime temperatures may occasionally hover near freezing, colder nighttime conditions could support accumulating snow, especially if multiple systems move through in quick succession.
Repeated snow chances could lead to slick and snow-covered roads along major corridors such as I-90, I-94, I-80, I-88, I-55, and I-74. Travel impacts may increase if snow events overlap with commute periods.
Residents are encouraged to prepare for winter driving conditions, ensure vehicles are equipped for snow, and monitor updated outlooks. Confidence will continue to improve as the period approaches, and additional winter weather advisories may be issued if the snow signal strengthens further heading into late January.
