Right now in St. Louis, the air is about 74°F, but the model estimates the asphalt under your dog's paws is closer to 76°F — a gap of roughly 2°F, because the pavement is shedding the day's stored heat after dark. That reading puts St. Louis 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 4 hours left today, the pavement in St. Louis is projected to top out near 76°F around 8 PM, when the air will be about 74°F — a 3°F gap between the forecast your weather app shows and the surface your dog walks on. The surface is already coming down, about 5°F over the next three hours, so waiting a little works in your favour here.
In an average October, St. Louis sees highs around 68°F and overnight lows near 50°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.
St. Louis loses its all-day safe window in 5 months of the year — May through September — and October is not one of them. The year peaks in July at an average high of 88°F against 41°F in January, a 47°F swing that decides how much of the day belongs to your dog.
The nearest city we track is Springfield, IL, roughly 86 miles from St. Louis — 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 St. Louis 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. Conditions in St. Louis 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.