Right now in Carrollton, the air is about 83°F, but the model estimates the asphalt under your dog's paws is closer to 83°F — the surface and air have nearly converged because clear skies are pouring full sun onto every dark surface. That reading puts Carrollton in the clear for an ordinary walk. Air temperature alone would have told you none of this — the pavement, not the forecast, is what your dog actually stands on.
Across the 17 hours left today, the pavement in Carrollton is projected to top out near 153°F around 4 PM, when the air will be about 109°F — a 44°F gap between the forecast your weather app shows and the surface your dog walks on. The surface is still gaining — up about 32°F over the next three hours — so a walk taken now is cooler than the same walk later this afternoon.
In an average August, Carrollton sees highs around 96°F and overnight lows near 78°F. At highs like that, sun-baked pavement can easily top 120–130°F by early afternoon, so the walkable hours cluster around dawn and after sunset. As a seasonal rule of thumb, the safest windows are before about 9:00 AM and after about 6:00 PM.
Carrollton loses its all-day safe window in 5 months of the year — May through September — and August is one of them. The year peaks in August at an average high of 96°F against 56°F in January, a 40°F swing that decides how much of the day belongs to your dog.
Carrollton sits about 9 miles from Lewisville, close enough that the two usually run within a degree or two of each other — if your walk crosses between them, either page answers the question. Street-level conditions still differ more than city-level ones do: a shaded side street and an open parking lot half a block apart can be twenty degrees apart underfoot.
Whatever the number says, confirm it with your hand: press the back of it flat on the pavement for seven seconds. If you can't hold it there, neither can your dog. Conditions in Carrollton are on the gentler side right now, but keep the same habits: water before and after, grass over asphalt, and a close eye on flat-faced breeds, seniors, and puppies, who overheat and burn sooner than a healthy adult dog.