Illinois starts the day under a cloud-thick December sky, the kind that mutes the sunrise and leaves the pavement looking slightly glazed even when dry. Light winds drift across parked cars, tapping reminders of the sharper cold ahead. For now, travel stays manageable, but the air carries that early-season winter tease signaling a quick change.
Mostly cloudy conditions hold through today with highs near 30°F, and a west wind building to 5–10 mph by midday. While snow stays away for most areas, commuters should stay alert along I-80, where even minor flurry bands south of the metro could briefly reduce visibility. Any untreated side streets may see patchy frost, especially in shaded neighborhoods.
Meteorologists are tracking a Saturday clipper—small but fast—and it brings the most notable winter impact of the weekend. Snow becomes likely, mainly after noon, with wind chills dropping toward –8°F. Accumulation remains modest—generally less than ½ inch—but bursts of snow combined with 10–15 mph northwest wind and gusts to 20 mph may create tougher travel south of I-80. Plan ahead for slower drives and reduced sightlines at intersections.
Sunday turns sunny but bitter. Highs near 13°F combine with lingering northwest flow to create the sharpest cold snap of the period. This is when wind chills plunge deepest—dangerous for long outdoor exposures, especially early. Keep gloves, hats, and emergency layers in vehicles.
Monday begins the slow thaw, reaching 23°F, but another round of wind chills may return Tuesday morning.
Five-Day Outlook
• Saturday: Snow likely, high 14°F.
• Sunday: Sunny, high 13°F.
• Monday: Partly sunny, high 23°F.
• Tuesday: Partly sunny, high 37°F.
• Wednesday: Chance of rain, high 45°F.
