St. Louis warms modestly Tuesday, then faces a sharp late-week freeze with weekend snow chances

Temperatures rebound Tuesday after frigid start

St. Louis is expected to see a noticeable but limited warmup on Tuesday, January 20, with afternoon temperatures climbing well above the morning chill. Forecast conditions call for a partly sunny day that is “not as cold,” with breezier winds developing during the afternoon.

The projected high is near 41 degrees, with temperatures dropping to around 30 degrees overnight. The day’s improvement follows a stretch of winter cold that brought widespread low temperatures across the region.

Midweek remains seasonable before a stronger cold push arrives

The moderation continues into Wednesday, January 21, when mostly sunny skies are expected and a high near 44 degrees. That midweek window appears brief. By Thursday, January 22, sunshine is forecast but with cooler air returning, bringing a high near 37 degrees and a low near 13 degrees.

Forecast guidance indicates the more significant change comes late in the week, when colder air strengthens and daytime temperatures struggle to recover.

Friday forecast signals the coldest day of the period

Friday, January 23, is forecast to be brisk and much colder, with a high near 16 degrees and an overnight low near 3 degrees. That combination increases the likelihood of very cold conditions during morning and evening commutes and raises the risk of icy patches where moisture is present.

Snow potential emerges for Saturday as cold persists

Saturday, January 24, remains frigid, with clouds expected and a chance of snow. The forecast calls for a high near 14 degrees and a low near 12 degrees, conditions that can allow snow to accumulate and persist on untreated surfaces. Sunday, January 25, is expected to stay quite cold, with a mix of sun and clouds and a high near 25 degrees.

What to watch through early next week

• Wind and rapid temperature changes on Tuesday afternoon, which can affect how cold it feels and how quickly conditions shift.
• Friday’s sharp drop in temperatures, which can raise the chance of localized slick spots if any moisture is present.
• Saturday’s snow possibility, with cold temperatures that can prolong hazardous travel conditions.

Forecast confidence is highest on the overall temperature trend: modest warming Tuesday and Wednesday, followed by a pronounced late-week freeze and a weekend window for winter precipitation.

Looking ahead to Monday, January 26, sunshine is expected to return with a high near 33 degrees, suggesting some easing of the cold after the weekend, though temperatures remain winterlike.