St. Louis, Missouri – Patriot Day events in St. Louis on Thursday will take place under unseasonably hot and sunny skies, with highs reaching 91°F. Those attending outdoor memorials should plan for heat exposure, limit time in direct sun, and stay hydrated.
According to the National Weather Service in St. Louis, calm morning conditions will shift to light northeast winds by the afternoon, bringing little relief from the heat. The warm stretch continues, with highs climbing toward 94°F by Saturday, keeping outdoor gatherings and travel along I-70 and I-64 under summer-like stress.
Across eastern Missouri and western Illinois, schools and commuters should prepare for a hot drive home each afternoon. Cars parked in direct sunlight could heat dangerously fast. Officials urge residents to check back seats for children and pets. Energy demand will also increase, and Ameren Missouri advises residents to conserve power during peak hours.
Friday will bring similar conditions with sunshine and highs near 93°F. The weekend outlook shows mostly sunny skies and highs topping out in the mid-90s, extending the need for heat safety measures even as the calendar pushes into mid-September. Despite the heat, skies remain rain-free, leaving events across the metro area without weather disruptions.
The extended warmth signals a stubborn hold of late-summer weather, with only light overnight breezes offering relief. By Tuesday, highs still hover around 92°F, meaning fall’s arrival remains delayed.
Five-Day Forecast for St. Louis, Missouri:
- Thursday: Sunny, high 91°F. Low 66°F.
- Friday: Sunny, high 93°F. Low 70°F.
- Saturday: Mostly sunny, high 94°F. Low 71°F.
- Sunday: Mostly sunny, high 93°F. Low 71°F.
- Monday: Mostly sunny, high 94°F. Low 70°F.
