Missouri – Afternoon sunlight glints off windshields across St. Louis as crisp air settles in and a colder feel spreads through the metro. The sky stays bright for now, but clouds will thicken later as the next wave of winter moisture approaches, setting up a colder stretch heading into the Jan 17–18 weekend.

According to the National Weather Service, highs reach the mid-30s today with northwest winds shifting to the south by evening. A quick drop in temperature after sunset could allow slick spots to form if snow arrives early. Forecasters expect a chance of light snow between 8 p.m. and midnight, with winds gusting near 20 mph. Travel on I-70, I-64, and Route 40 may slow during the initial burst.

Friday brings a mixed setup. Meteorologists now track scattered sprinkles early in the afternoon, followed by isolated snow showers as colder air returns. While accumulations look limited, temperatures fall into the lower 20s Friday night with gusts up to 23 mph, increasing the risk of a flash freeze on untreated roads and elevated bridges. Drivers should plan extra time after sunset as pavement hardens quickly.

Saturday stays cold and partly sunny with highs holding near the upper 20s. A steady northwest wind keeps the air sharp, and any lingering moisture may refreeze. Sunday turns brighter with highs near 28°F, but the morning still carries a chill that commuters and early travelers will feel. By Monday, slightly warmer air arrives, though the broader winter pattern persists.

More moisture returns by midweek as the central U.S. becomes more active. Conditions may shift fast as reinforcing cold pushes back toward the Mississippi Valley.

Traveling this weekend? Tell us what conditions you’re seeing across the metro.

Five-Day Weather for St. Louis, Missouri

• Today: Sunny. High near 35°F.
• Tonight: Chance of snow. Low near 28°F.
• Friday: Sprinkles, then isolated snow showers. High near 45°F.
• Friday Night: Scattered snow showers. Low near 22°F.
• Saturday: Partly sunny. High near 27°F.
• Saturday Night: Partly cloudy. Low near 13°F.
• Sunday: Mostly sunny. High near 28°F.
• Sunday Night: Mostly cloudy. Low near 16°F.
• MLK Day: Mostly sunny. High near 26°F.