Right now in Fremont, the air is about 52°F, but the model estimates the asphalt under your dog's paws is closer to 52°F — the surface and air have nearly converged because the pavement is shedding the day's stored heat after dark. That reading puts Fremont 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 22 hours left today, the pavement in Fremont is projected to top out near 111°F around 2 PM, when the air will be about 71°F — a 40°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, Fremont sees highs around 75°F and overnight lows near 55°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.
Fremont 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 August at an average high of 80°F against 58°F in December, a 22°F swing that decides how much of the day belongs to your dog.
Fremont sits about 10 miles from Hayward, 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 Fremont 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.