St. Louis is sunny and hot today, with a high near 94°F and the heat index climbing to 103° under a Heat Advisory — plan outdoor errands for early morning, hydrate constantly, and save strenuous activity for after sunset.
Today’s Setup
The National Weather Service St. Louis office has a Heat Advisory in effect along the Missouri River and near I-70 today, with heat index readings expected between 100 and 108 degrees across the region. A cold front tied to low pressure over the Ohio Valley is dragging south and west through Illinois into Missouri, and forecasters note a chance that clouds and showers moving in from the west could bring an early end to the worst of the heat this afternoon — though confidence is limited since guidance shows that activity weakening as it arrives. Overnight lows only dipped to 79° under mostly clear skies, so there was little relief before sunrise.
Best Window To Be Outside
Morning is your best window today — a walk along the riverfront near the Gateway Arch beats any afternoon plans while northwest winds stay light at 6 to 9 mph. Wednesday flips the script completely, with sunny skies, a high near 88°, and 0% rain chance, making it the better day for yard work, golf, or an extended afternoon outside.
Rain, Heat Or Storm Risk
Local rain chances stay low — just 3% today and 6% tonight — so heat, not water, is the main story here. The Weather Prediction Center’s moderate excessive rainfall risk today is centered on the New Jersey-New York-Connecticut tri-state area, not St. Louis, so flash flooding isn’t a concern locally right now.
What To Wear Or Bring
Light, breathable clothing and sun protection matter most during daytime hours. A UPF 50+ Sun Hoodie is a cheap, easy way to guard against sunburn at the ballpark or on the water, and it’s one of several outdoor gear deals worth checking before you head out. Evenings cool into the low-to-mid 70s, so bring mosquito repellent spray for anything near the river after dark.
Cardinals, Concerts & This Week’s Events
The St. Louis Cardinals host the Chicago Cubs at Busch Stadium tonight, Wednesday, and Thursday (July 28-30) — hydrate before first pitch tonight given the lingering heat. Get tickets on SeatGeek and gear up in a St. Louis Cardinals jersey or St. Louis Cardinals fitted cap. Music fans have options tonight too, with Aimee Mann at The Pageant and Evanescence at Hollywood Casino Amphitheater — comfortable, low-70s evening air for both.
Dinner Tonight
Let the grill handle dinner once the sun drops and temps ease — burgers, steaks, or grilled chicken with corn on the cob are the move tonight. An instant-read meat thermometer keeps you from overcooking in a hurry, and if you want to try something different this week, our smoke tri-tip guide is worth a look. Need ingredients? You can order groceries on Amazon and have everything for tonight’s dinner delivered to your door.
Next Few Days
Expect temperatures near to below normal through the rest of the week as the front settles in, with Wednesday’s high near 88° and lows in the upper 60s Wednesday night. The next real rain chance for the area arrives Thursday night into Saturday, according to the National Weather Service.
