ST. LOUIS, Mo – A streak of mild, sunny fall days continues into midweek as the St. Louis region enjoys a late-season warm spell before a gradual cooldown returns later this week. After a bright Columbus Day holiday, sunshine and light winds will make Tuesday one of the warmest days of October, with highs near the low 80s across eastern Missouri and southwest Illinois.
According to the National Weather Service in St. Louis, south winds will keep temperatures above average through Tuesday before shifting northeast by Wednesday. Those commuting along I-70 and I-55 can expect dry, calm conditions with good visibility — ideal for early-week travel or outdoor school activities. Light winds mean stable driving conditions and excellent leaf-viewing weather across Forest Park, Tower Grove, and southern Illinois’ Great River Road region.
By midweek, a slow dip in temperatures will bring highs back into the upper 70s. Cooler mornings will make for crisp starts as fall events and school routines resume after the long weekend. No rain or frost concerns are expected through Thursday, giving residents a perfect stretch for decorating porches, cleaning gutters, or visiting pumpkin patches before the next front arrives late Friday.
Meteorologists note a 20–40% chance of showers developing by Friday night into Saturday, marking the first sign of a more typical mid-October pattern. Until then, enjoy unseasonably pleasant weather and make the most of these warm fall days.
Five-Day Forecast for St. Louis, MO:
Sun: 80/56 – Sunny and warm; calm winds 5–8 mph.
Mon (Columbus Day): 82/62 – Mostly sunny; light south breeze.
Tue: 83/61 – Mostly sunny and mild; light northeast wind.
Wed: 78/56 – Mostly sunny; comfortable fall day.
Thu: 78/57 – Sunny; mild and dry ahead of late-week cool shift.
