St. Louis, MO–IL — A blanket of low clouds dimmed the Mississippi River skyline early Saturday, casting a muted start to the weekend. The quiet scene won’t hold for long. A sluggish weather system is poised to spread showers across the metro area and nearby Illinois counties late Sunday, ushering in a damp beginning to the workweek.
The National Weather Service in St. Louis expects Saturday to stay overcast with highs near 62°F and a gentle east breeze. Most spots will remain dry, though a few stray sprinkles could pop up toward evening in Franklin and St. Clair Counties. As moisture increases from the south overnight, rain chances tick upward into Sunday morning.
By Sunday afternoon, light rain should become more widespread—especially along the I-70 corridor and into the Metro East. On Monday, bands of showers linger with occasional pauses, keeping skies thick and gray. Highs around 61°F will feel cooler under persistent clouds and steady easterly winds. Plan for slick roads on the Monday commute, and keep an umbrella handy through Tuesday.
No severe weather is anticipated, but this setup signals a definite turn toward a cooler, wetter pattern heading into Halloween week. Partial sunshine may break through on Wednesday before another round of showers threatens late in the week.
Consider this gray stretch a preview of the chillier November ahead.
Five-Day Outlook for St. Louis, MO–IL:
– Sat: 62/52 — Overcast with a light east wind.
– Sun: 62/51 — Increasing chance of rain late.
– Mon: 61/52 — Showers likely; damp and breezy.
– Tue: 60/46 — Mostly cloudy; a few light showers possible.
– Wed: 58/42 — Partly sunny with a cooler midweek trend.
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