Illinois — A dull gray sky hangs low over northern Illinois this morning, with cold air clinging to streets and sidewalks across the Chicago area. While conditions look quiet at first glance, changes arrive quickly as February weather stays on edge.
According to the National Weather Service Chicago office, a narrow band of accumulating snow may develop late tonight, favoring areas south and southeast of the city. The highest concern stretches from near Sterling through Kankakee, extending into northwest Indiana toward Rensselaer. Even light snow could create hazardous travel during late-night and early-morning hours.
Through the day, temperatures struggle to rise out of the 20s. A few flurries may drift through by late morning, but most roads remain dry for now. That window closes after sunset. Scattered snow showers increase overnight, with brief bursts capable of coating untreated pavement. Visibility may drop quickly under heavier bands.
Wednesday brings lingering snow showers early, then gradual clearing. Highs remain near the mid-20s, keeping any snow that falls firmly frozen. Drivers should expect slick bridges, ramps, and shaded stretches, especially along I-80, I-57, and surface streets south of downtown.
By Thursday, conditions ease. Clouds thin, and temperatures climb into the low 30s. A slight rain-snow mix is possible late Thursday night, but impacts appear limited. Friday turns milder, with highs nearing the upper 30s and quieter travel conditions.
Looking ahead, the broader pattern hints at a slow warmup later next week. With snow cover patchy and the Great Lakes still heavily frozen, rapid temperature swings remain possible. Melting by day and refreezing after dark continues to raise the risk for flash-freeze slick spots.
Traveling late tonight or early Wednesday? Slow down and allow extra time. Seeing snow stick in your neighborhood? Share what conditions look like where you are.
Five-Day Outlook for Chicago, IL
- Wednesday: Scattered snow showers early, then partly sunny, high near 26
- Thursday: Mostly cloudy, high near 32
- Friday: Partly sunny, milder, high near 38
- Saturday: Mostly sunny, high near 27
- Sunday: Partly sunny, high near 28
