Missouri wakes under a soft gray ceiling, the air crisp enough that each breath hangs briefly before fading in the cool December light. Pavement glistens from lingering moisture, a sign of the subtle shift underway as colder air continues spilling south. Anyone out early will feel that bite deepen through the weekend.
Light snow remains a possibility later today across west-central and south-central Illinois, while St. Louis stays mostly cloudy with a high near the upper 30s. The region remains quiet for now, but meteorologists are tracking a “Winter Tease” ahead—one that brings a chance for light snow Saturday, mainly north of I-70, followed by a significant cold snap that will hit hardest late Saturday night into Sunday morning.
Saturday brings a modest 20–30% chance of snow by mid-afternoon, especially for communities near Jersey, Madison, and Macoupin Counties. Accumulations look minor, but even a dusting can reduce traction and hide slick spots on I-70 and I-55. Plan extra time if you’re traveling to holiday events.
The real story arrives Saturday night into Sunday. A surge of Arctic air will drop temperatures sharply, with Sunday morning lows near 5°F in the metro and wind chills potentially far below zero in rural areas. Frostbite becomes possible on exposed skin within short periods—especially in the pre-sunrise hours. Layer up, keep gloves and hats handy, and limit time outdoors.
Sunday stays cold but sunny, with highs struggling to reach the mid-teens. By Monday, the region begins a slow warming trend under clear skies.
⭐ Five-Day Outlook (St. Louis, MO)
• Today: Mostly cloudy, upper-30s.
• Saturday: Light snow chance, near 29°F.
• Sunday: Bitter cold, mid-teens.
• Monday: Sunny, upper-30s.
• Tuesday: Mostly sunny, mid-40s.
