ST. LOUIS, Mo. – The city wakes beneath a calm, golden sky this Monday morning, the kind of crisp fall start that makes the Gateway Arch gleam against a still river. Don’t get too comfortable — the weather this week will stay active, with breezy winds building Tuesday and the first hint of late-week rain waiting in the wings.
According to the National Weather Service in St. Louis, Monday will bring near-perfect fall weather, with highs around 73°F and light southerly winds. By Tuesday, those winds strengthen, gusting between 25 and 30 mph as another warm, dry front sweeps across eastern Missouri and southwest Illinois. The day will stay sunny but noticeably breezier, especially along I-70 and across the Mississippi River bridges.
The region holds dry through midweek, with Wednesday offering another bright, comfortable day — highs in the mid-60s and cool lows in the 40s. But by Thursday night, the next system approaches, bringing a 20–40% chance of showers that could linger into Friday. Rain chances stay light for now, though models hint at a more organized band developing late Friday into early Saturday, potentially adding to a damp weekend start.
Looking ahead, temperatures remain steady through Sunday, hovering near 67°F by day and mid-40s by night — a classic mid-autumn stretch before cooler air edges in next week. Early signs point toward a stronger front late next weekend, one that could bring the season’s first frost risk to rural stretches west of the metro.
Five-Day Outlook for St. Louis, MO–IL:
Mon: 73/51 – Sunny, calm, and warm.
Tue: 66/45 – Breezy, mostly sunny; gusts to 30 mph.
Wed: 65/43 – Clear, crisp, and calm.
Thu: 67/45 – Increasing clouds; slight rain chance late.
Fri: 67/50 – Scattered showers; seasonable air returns.
