Right now in Jacksonville, the air is about 79°F, but the model estimates the asphalt under your dog's paws is closer to 123°F — a gap of roughly 44°F, because clear skies are pouring full sun onto every dark surface. That reading puts Jacksonville in the caution range, where short, shade-hugging walks are the most a paw should take. Air temperature alone would have told you none of this — the pavement, not the forecast, is what your dog actually stands on.
Across the 10 hours left today, the pavement in Jacksonville is projected to top out near 123°F around 2 PM, when the air will be about 79°F — a 43°F gap between the forecast your weather app shows and the surface your dog walks on. The surface is already coming down, about 19°F over the next three hours, so waiting a little works in your favour here.
In an average October, Jacksonville sees highs around 79°F and overnight lows near 66°F. Those are forgiving numbers, but don't let them lull you — a sunny, still afternoon can still heat dark asphalt far above the air, especially for low-riding or short-coated dogs. For this month the normals suggest pavement rarely reaches unsafe temperatures here, but the seven-second hand test is still the final word on any given day.
Jacksonville loses its all-day safe window in 6 months of the year — April through September — and October is not one of them. The year peaks in July at an average high of 89°F against 65°F in January, a 24°F swing that decides how much of the day belongs to your dog.
The nearest city we track is Gainesville, roughly 62 miles from Jacksonville — far enough that its reading is no substitute for this one. Sun angle, humidity and cloud cover can all differ across that distance, which is why this page models Jacksonville on its own coordinates.
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. On a day reading this warm in Jacksonville, flat-faced breeds like pugs and bulldogs, plus seniors and young puppies with thinner pads, should sit out the heat entirely — subtract about 10°F from any safe threshold for them. If you must cross hot ground, protective booties or a quick coat of paw wax are the only real barrier between paw pads and the asphalt.