St. Louis, Missouri – A crisp, clear start greets St. Louis this Thursday morning, with the air cool enough to see your breath before sunrise. But by late Friday, clouds and scattered showers will edge back into the region — the first hint of a cooler, wetter pattern that will linger into the weekend.
The National Weather Service in St. Louis calls for a quiet and sunny Thursday with highs around 64°F, ideal for fall yard work or outdoor errands. Winds remain calm, but by Friday afternoon, moisture will lift north from the Ozarks, bringing a 20% chance of light showers that could dampen parts of I-70 and I-64 corridors by evening. No severe weather is expected, but slick roads and reduced visibility may affect commuters and late-night travelers.
Saturday’s skies will stay mostly cloudy, with a steady east breeze and highs in the low 60s. On Sunday, temperatures hold near 64°F, with another round of light rain possible during the afternoon. While rainfall totals should stay light, damp leaves and cool breezes will mark a noticeable seasonal shift across eastern Missouri and southwest Illinois.
Looking ahead, Monday begins brighter and warmer with highs near 66°F, though another system midweek could bring renewed rain and a drop in temperatures. For now, it’s a stretch of true fall weather — calm, cloudy, and quietly setting the stage for November’s colder turn.
Five-Day Outlook for St. Louis, MO–IL:
Thu: 64/40 – Sunny; calm wind.
Fri: 62/50 – Increasing clouds; slight rain chance.
Sat: 63/51 – Mostly cloudy; light showers possible.
Sun: 64/52 – Cloudy; scattered rain.
Mon: 66/50 – Partly sunny; warmer afternoon.
