Right now in Santa Clarita, the air is about 96°F, but the model estimates the asphalt under your dog's paws is closer to 125°F — a gap of roughly 29°F, because clear skies are pouring full sun onto every dark surface. That reading puts Santa Clarita 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 8 hours left today, the pavement in Santa Clarita is projected to top out near 125°F around 4 PM, when the air will be about 96°F — a 29°F gap between the forecast your weather app shows and the surface your dog walks on. The surface is already coming down, about 37°F over the next three hours, so waiting a little works in your favour here.
In an average October, Santa Clarita sees highs around 83°F and overnight lows near 58°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.
Santa Clarita loses its all-day safe window in 7 months of the year — April through October — and October is one of them. The year peaks in August at an average high of 95°F against 61°F in January, a 34°F swing that decides how much of the day belongs to your dog.
The nearest place we track is Simi Valley, about 16 miles away. That is close enough to move together in a heat wave but far enough that a passing cloud bank or a coastal breeze can put real distance between the two readings, so check Santa Clarita's own page rather than assuming.
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 Santa Clarita, 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.