Chicago, Illinois – A colder-than-normal weather pattern expected to settle across northern Illinois between Tuesday and Saturday is increasing concern for snow and potential travel disruptions, especially in the Chicago metro area. The developing setup favors sustained cold air, raising the likelihood that any systems moving through during this window could bring accumulating snow rather than rain.
According to the National Weather Service Climate Prediction Center, northern Illinois is favored for below-normal temperatures during the January 20–24 period, while precipitation probabilities trend above normal at 40–50%. With cold air firmly entrenched, precipitation is more likely to fall as snow, and periods of lake-enhanced snowfall from Lake Michigan could further increase impacts near the lakeshore.
In Chicago, daytime temperatures are expected to remain suppressed, with overnight lows well below freezing. Cold pavement temperatures may allow snow to accumulate quickly and linger, increasing the risk of slick roads and hazardous travel. Suburban areas north and west of the city, including DuPage, Lake, and McHenry counties, may see more persistent snow if storm tracks favor northern Illinois.
Major transportation corridors such as I-90, I-94, I-290, I-294, and Lake Shore Drive could become hazardous during snow periods, particularly overnight and during early morning commutes. Prolonged cold may also increase the risk of icy conditions even outside of snowfall, as untreated surfaces remain frozen for extended periods.
Residents are encouraged to prepare ahead of the Jan 20–24 window by checking heating systems, insulating exposed pipes, and ensuring vehicles are stocked with winter emergency supplies. Commuters should plan for slower travel and possible delays if snow develops during peak hours.
This cold-driven pattern is expected to persist through late week, and confidence may increase that at least one impactful snow event could affect northern Illinois. Additional winter weather advisories or alerts may be issued as conditions come into clearer focus.
