Friday, July 3, St. Louis woke to a heavy, sticky morning, with early readings in the mid‑70s and dew points in the low‑70s. Temperatures are expected to top out near 96°F, and overnight lows are set to stay in the mid‑ to upper‑70s, so there will be little relief after sunset. With that kind of heat and humidity, heat‑index values are expected to climb into the 105–108°F range at times.
Heat Headlines
The National Weather Service is warning of dangerously hot conditions for the St. Louis area, and an Extreme Heat Warning is posted through Saturday, July 4 at 8:00 p.m. CDT. Expect highs near 96°F, with the heat feeling more like roughly 105–108°F during the peak afternoon hours, according to the National Weather Service. City officials are echoing the heightened concern via the City of St. Louis.
Afternoon Storms May Interrupt The Heat
There is a slight chance of scattered showers and isolated thunderstorms after about 1 p.m., but coverage is expected to be spotty, at roughly 20 percent. Any storms that form could bring brief heavy rain and gusty winds that temporarily cut the heat for a neighborhood or two. Most areas, however, are likely to stay hot and humid through the evening.
Where To Cool Off
The City maintains a rotating list of neighborhood cooling sites, including libraries, senior centers and nonprofit spaces that open during heat emergencies. Call 2‑1‑1 before you go to confirm hours. For locations and hours, see the City of St. Louis.
How To Stay Safe
Avoid strenuous outdoor activity during the hottest afternoon hours, drink plenty of water, and check on older relatives, neighbors and anyone without reliable air conditioning. If you or someone else shows signs of heat exhaustion or heat stroke, move to a cool place and seek medical help. For official safety guidance, see the National Weather Service.
