St. Louis, Missouri – Sun-heated pavement will become the dominant concern as temperatures surge 10 degrees by Tuesday. Today reaches 90, but three increasingly hot afternoons will push the region toward triple-digit territory.
According to the National Weather Service in St. Louis, mostly sunny skies will send temperatures near 90 today. South winds remain light at 5 to 7 mph.
St. Louis Lambert International Airport reported 73 degrees before 8 a.m. Humidity stood at 66%, while visibility remained 10 miles.
The heat accelerates Sunday. Temperatures reach 95 degrees under mostly sunny skies, followed by a low near 75.
Monday delivers another sharp increase. Sunshine pushes the high to 98 degrees, with south winds near 8 mph.
Plan strenuous outdoor work for cooler morning hours. Drink water regularly and check on people without reliable air conditioning.
Tuesday marks the five-day peak at 100 degrees. The following low only falls to around 80, limiting relief before Wednesday reaches 99.
Drivers crossing the Mississippi River or traveling I-64, I-70 and I-55 should prepare for intense afternoon heat. Vehicle interiors can become extremely hot quickly. Never leave children or pets inside parked vehicles.
The supplied Weather Prediction Center discussion tracks an expanding frontal system across the Upper Midwest and Great Lakes. However, the local St. Louis data remains dry through Wednesday. No thunderstorms, tornado risk or measurable precipitation appear in the supplied five-day outlook.
Thursday remains hot near 98. A 20% shower chance finally appears Thursday night and continues Friday, beyond the five-day period.
For now, the developing story is the rapid temperature climb. St. Louis goes from 90 today to 100 Tuesday before barely easing Wednesday.
Five-Day St. Louis Weather Outlook
- Today: Mostly sunny. High 90. South winds 5-7 mph.
- Sunday: Mostly sunny and hotter. High 95.
- Monday: Sunny and hot. High 98.
- Tuesday: Sunny and hot. High 100. Low near 80.
- Wednesday: Sunny and hot. High 99.
