Chicago, Illinois – Slick spots could develop on I-90, I-94 and I-55 before 8 a.m. Thursday as light overnight snow brushes northern Illinois, but temperatures climbing 15 to 20 degrees above seasonal averages will melt most accumulation before the late-morning commute.
According to the National Weather Service Climate Prediction Center, Illinois sits in a 50 to 60 percent above-normal precipitation zone through Tuesday. That stronger signal spans much of the Midwest and Great Lakes, increasing the likelihood of multiple systems crossing the state as February winds down.
In Chicago, where average highs this time of year sit in the mid-30s, afternoon readings next week may climb into the upper 40s and low 50s. Rockford and areas along I-39 could see brief bursts of overnight snow or a rain-snow mix before daytime melting takes over. Springfield and central Illinois are more likely to see mainly rain as milder air surges north during the day. In southern Illinois, including Carbondale and along I-57, highs could push the mid-50s with steady rain at times.
The broader outlook favors above-normal warmth stretching from the Gulf Coast into the Midwest and parts of the Northeast, while cooler air lingers across the northern Plains and West Coast. That contrast keeps the jet stream active over the region, supporting periodic rounds of precipitation.
Drivers should allow extra time during early morning travel, clear storm drains to reduce ponding and monitor IDOT updates for changing road conditions. The milder pattern holds into early next week, though additional advisories could follow if stronger systems develop. Winter is weakening across Illinois, but it has not fully stepped aside.
