Missouri–Illinois – Cold air grips the Mississippi River Valley this morning, frosting rooftops and stiffening the air as commuters step outside before sunrise.
Temperatures sit near 18 degrees around the St. Louis metro, including nearby Illinois communities. Calm winds keep conditions quiet, but the cold feels sharp after several frigid nights. Side streets and sidewalks remain dry for now, though lingering ice hides in shaded spots.
Today turns brighter and slightly milder. Sunshine pushes highs toward 39 degrees, enough to soften snow piles and dampen pavement. Any melting will be short-lived. Once the sun drops, temperatures fall quickly, allowing refreeze to set in again. Watch bridges, ramps, and parking lots after sunset, especially along I-64, I-70, and I-55.
Friday continues the rebound. Skies stay mostly sunny, and highs climb near 48 degrees. A light northwest breeze develops during the afternoon, but travel remains smooth. It will feel noticeably better outside, even if winter still lingers.
Friday night cools back into the mid-20s, then Saturday settles into a quieter pattern. Expect sunshine mixed with clouds and highs near 37 degrees. It’s a calm winter day, though surfaces stay cold enough for icy patches early and late.
Sunday brings the biggest change. Temperatures surge into the mid-50s, offering a taste of spring across eastern Missouri and southwest Illinois. Snowmelt accelerates, puddles spread, and runoff increases near curbs and storm drains. After dark, cooler air returns, but refreezing is less widespread.
Looking ahead, the warming trend strengthens. Monday pushes close to 60 degrees, and NOAA’s 6–10 day outlook favors above-normal temperatures across the central U.S. That points to a broader Midwest thaw, even as February keeps a few cold surprises in reserve.
Drivers should remain cautious during early mornings and evenings. Did you notice slick spots on your route today?
Five-Day Outlook for St. Louis, MO–IL
- Today: Partly sunny, cold start, high near 39
- Friday: Mostly sunny, milder, high near 48
- Saturday: Mostly sunny, cool, high near 37
- Sunday: Mostly sunny, springlike, high near 55
- Monday: Sunny and warm, high near 60
