San Antonio wakes up to a sweltering Juneteenth with a high near 93°F — and a heat index climbing as high as 106°F means today demands careful planning around the heat and a round of afternoon thunderstorms.
Today’s Setup
A weak frontal boundary is stalling over Central Texas today, according to the National Weather Service in Austin/San Antonio. Humid southeast-to-east flow is keeping dewpoints near 80°F draped over the Alamo City, which is why that 93°F air feels so much more punishing. Cloud cover from overnight convection may actually hold temperatures a tick lower than a fully sunny June afternoon would — but don’t mistake clouds for comfort. It’s still dangerously hot out there.
Best Window to Be Outside
Your outdoor window is before 1 PM CT. The National Weather Service expects showers and thunderstorms to fire after 1 PM CT as lift increases along the frontal boundary. Morning is the move: a River Walk stroll, a Juneteenth celebration at Brackenridge Park, or a quick North Side errand run — get it done early. By mid-afternoon, keep one eye on the western sky.
Heat and Storm Risk
Storm chances sit at 30% today and climb to 40% tonight. The Storm Prediction Center has no severe weather outlook for our area, but San Antonio is firmly in Flash Flood Alley — even routine afternoon storms can flood low-water crossings and the River Walk corridor with little warning. If water is covering a road, turn around and don’t drown.
The 106°F heat index makes hydration non-negotiable. Carry an insulated tumbler 30oz filled with ice water all day, and keep a Yeti hopper soft cooler stocked in the car for family outings.
Spurs Game 7 and Kali Uchis Tonight
San Antonio has a packed evening ahead. The San Antonio Spurs host the New York Knicks in NBA Finals Game 7 at Frost Bank Center tonight — an indoor arena, so the game itself is storm-proof. But afternoon rain could slow downtown traffic and make the commute messy. Leave early, and show your Silver and Black with Official team gear on Fanatics. Still need seats? Get tickets on SeatGeek or Find tickets on StubHub before they’re gone.
Also tonight: Kali Uchis brings the For The Girls Tour to Germania Insurance Amphitheater. That’s an outdoor venue, so storm timing matters. If afternoon cells clear by showtime, expect a warm, muggy but manageable night. Bring a light rain jacket just in case, and pack men’s sport sandals and ventilated workout shorts men for the walk-in heat.
Beat the Heat at Dinner
Skip the stove entirely tonight — this is smoothie bowl or cold Thai noodle salad weather. A high-powered blender makes quick work of frozen fruit and thick bases and keeps the kitchen cool. Need ingredients? You can order groceries on Amazon and have everything for tonight’s dinner delivered straight to your door.
Next Few Days
Saturday stays unsettled — high near 91°F, heat index up to 103°F, and a 40% storm chance that could spike with afternoon heating, per the National Weather Service. If you’re eyeing the Nate Bargatze: Big Dumb Eyes World Tour at Moody Center ATX on Saturday, watch that afternoon storm window before heading up I-35. Sunday looks marginally drier before heat and humidity reload early next week. Keep tabs on your San Antonio weather forecast for the latest updates, and browse outdoor gear deals to gear up for a stormy long weekend.
