ST. LOUIS, MO – A streak of bright, dry fall weather will carry through the weekend, setting up perfect conditions for outdoor plans across eastern Missouri and southwest Illinois. After a mild Friday morning, temperatures will rise into the upper 70s and low 80s through Sunday, bringing unseasonable warmth ahead of a sharp cooldown by midweek.
According to the National Weather Service in St. Louis, no hazardous weather is expected through Monday, though a few morning fog patches could briefly reduce visibility near I-70 and I-55. The region will stay dry and mostly sunny, offering great conditions for fall festivals, park walks, and late-season pumpkin patch visits. By Tuesday, a strong cold front will sweep through Missouri, pulling temperatures down into the 60s with brisk northwest winds.
Motorists should expect light leaf debris and early fog near wooded stretches of I-64 and U.S. 67 during early commutes. Air quality and visibility remain good, but cool, calm mornings may allow brief valley fog near the Mississippi River. Homeowners are encouraged to take advantage of the mild spell to finish outdoor maintenance before next week’s chill arrives.
The week’s second half will feel noticeably different as colder air settles in by Wednesday, signaling the season’s first stronger Fall Cold Snap.
Five-Day Forecast for St. Louis, MO:
Fri: 77/57 – Increasing clouds; calm breeze, warm afternoon.
Sat: 79/54 – Mostly sunny; light winds, perfect fall day.
Sun: 82/57 – Sunny, warm; ideal for pumpkin patches and outdoor events.
Mon: 82/60 – Mostly sunny; turning breezy by evening.
Tue: 68/50 – Partly cloudy; temps drop sharply with northwest wind.
