Missouri – A crystal-clear morning greets St. Louis under bright skies and biting cold. The early December chill still grips the region, but subtle changes are already stirring. After today’s sunshine and highs near 41°F, clouds will build and temperatures will climb — just enough to create a messy mix by late Saturday night into Sunday.
Meteorologists at the National Weather Service in St. Louis warn that a developing system will approach from the west, spreading light rain Saturday night that may transition to a rain–snow mix Sunday morning. While major accumulations aren’t expected, even a trace to an inch of snow could cause slick travel across I-70, I-64, and I-55, especially on bridges and untreated roads.
Temperatures will hover near freezing early Sunday, keeping conditions tricky through midday before gradual drying in the afternoon. Gusts up to 15 mph may reduce visibility during the heaviest bursts. Plan extra time for early drives or church travel and keep a close eye on updated road advisories.
After the system clears, Monday turns mostly sunny and cold, with highs in the low 30s. By Tuesday, sunshine dominates again and temperatures recover into the upper 40s — a brief thaw before another chance of light rain midweek. Long-range models hint that the second week of December could bring a renewed surge of Arctic air and increased snow chances for the central Midwest.
For now, bundle up and prepare for a slushy, slow Sunday morning across metro St. Louis.
Planning to travel Sunday? Share what you’re seeing on area roadways.
Five-Day Outlook for St. Louis, MO:
Fri: 41/35 – Sunny, calm winds, cold morning start.
Sat: 38/31 – Clouds increase, late rain chance.
Sun: 38/15 – Rain/snow mix possible; slippery roads.
Mon: 32/24 – Mostly sunny, brisk and dry.
Tue: 48/38 – Mild and mostly sunny; quiet stretch.
