Right now in Hialeah, the air is about 79°F, but the model estimates the asphalt under your dog's paws is closer to 81°F — a gap of roughly 2°F, because clear skies are pouring full sun onto every dark surface. That reading puts Hialeah in the clear for an ordinary walk. Humidity is nudging the human "feels-like" to about 84°F, which matters for your dog too: muggy air makes it harder for a panting dog to shed heat, so treat a borderline reading as the hotter of the two.
Across the 16 hours left today, the pavement in Hialeah is projected to top out near 127°F around 1 PM, when the air will be about 89°F — a 38°F gap between the forecast your weather app shows and the surface your dog walks on. Today breaks into 2 separate safe stretches rather than one continuous window, so missing the first does not cost you the day.
In an average October, Hialeah sees highs around 84°F and overnight lows near 73°F. Even at those moderate highs, a dark surface in direct sun can run 40–60°F hotter than the air, which is enough to tip midday walks into the caution range. As a seasonal rule of thumb, the safest windows are before about 12:00 PM and after about 3:00 PM.
Hialeah loses its all-day safe window in 8 months of the year — March through October — and October is one of them. The year peaks in August at an average high of 89°F against 76°F in January, a 13°F swing that decides how much of the day belongs to your dog.
Hialeah sits about 6 miles from Miami Gardens, 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 Hialeah 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.