St. Louis woke up to air you could practically wear on Thursday, July 2, and the city will stay stuck in the sauna through the Fourth of July holiday under an Extreme Heat Warning. Temperatures are headed for the mid to upper 90s, and the humidity will shove heat index values well above 100°F during the hottest hours. A few isolated afternoon storms may bubble up, but they are not expected to bring widespread relief. Officials are urging residents to use cooled spaces and check on neighbors, children and pets.
Forecast Through Friday
The National Weather Service St. Louis has an Extreme Heat Warning in place until 10 p.m. CDT Friday, July 3. Forecasters are calling for a high near 96°F on Thursday and about 97°F on Friday, with heat index readings that could peak between 106°F and 109°F. There is a slight chance, around 20%, of showers and thunderstorms each afternoon. Any storms that do form could bring brief heavy rain and gusty winds, but they are not expected to be widespread. Nights will stay muggy, with lows in the upper 70s that will offer little real relief.
When It Will Feel Worst
The most dangerous window will be early to mid afternoon, roughly 1 to 5 p.m., when outdoor exertion carries the highest risk of heat exhaustion or heat stroke. If you work or spend time outside, shift strenuous activities to early morning or evening, take frequent breaks in shade or air conditioning, and drink plenty of fluids. Never leave children or pets unattended in vehicles, even for a short time.
Where To Find Relief
The City of St. Louis keeps a list of public cooling sites and community centers that open during extreme heat events. Residents can call 2-1-1 to confirm hours and availability. Two commonly used locations are the Central Library at 1301 Olive Street and St. Patrick Center at 800 N Tucker Blvd, both open as cooling options during heat events.
Fourth Of July Outlook
Saturday, July 4, will stay on the steamy side, with a high near 96°F and a higher chance of showers and thunderstorms between about 1 and 4 p.m. That could complicate outdoor gatherings and fireworks plans, so it is smart to keep a backup plan and watch conditions through the day.
Bottom Line
Take the warning seriously, limit outdoor exposure during peak heat, plan for brief stormy periods in the afternoons, and use public cooling centers if you do not have air conditioning. Check the City of St. Louis cooling centers page for the latest updates before heading out.
