How hot is too hot to walk a dog?

On this page

1. Air versus asphalt
2. The hand test
3. Flat-faced, overweight and senior dogs
4. Signs of heat stress
5. Earlier, shorter, greener
6. Rest days in a heatwave

Two lines matter. Above about 85°F (29°C) in sun, pavement gets hot enough to burn paws, and it can happen from the high 70s onward. Above about 90°F (32°C), heatstroke risk climbs for every dog, and for flat-faced, overweight, elderly and thick-coated dogs the danger starts around 75 to 80°F. The fix is the same at every temperature: walk at dawn or after dark, on grass, for less time, and do the hand test on any hard surface first.

Air versus asphalt

Pavement in direct sun runs far hotter than the air, and dark asphalt hottest of all. The University of Georgia's climate extension and the Journal of the American Medical Association data that the AKC cites give roughly these figures:

Grass, dirt and shaded concrete stay far cooler. The number on your weather app is the least useful one you have; the surface under the dog is what counts.

The hand test

Press the back of your hand flat on the pavement and hold it. If you cannot keep it there comfortably for 7 to 10 seconds, the surface is too hot for paws. It takes five seconds and it is more reliable than any chart, because it accounts for sun, shade, surface colour and the breeze. Do it at the start of the walk and again whenever the route leaves the shade.

Flat-faced, overweight and senior dogs

Dogs cool themselves by panting, moving air over the tongue and airways. Anything that limits airflow or adds heat load moves the danger line down:

• Brachycephalic breeds (Bulldogs, French Bulldogs, Pugs, Boston Terriers, Shih Tzus, Pekingese): narrowed airways make panting inefficient. They can overheat on a 75°F walk that a Beagle would not notice. Short walks, cool hours, and noisy breathing means stop.
• Overweight dogs: fat insulates and the heart works harder. An overweight dog at 80°F is a lean dog at 90.
• Seniors and puppies: poorer temperature regulation in both directions.
• Thick or dark coats: Huskies and Newfoundlands carry their winter with them; black coats absorb the sun.
• Heart or airway disease: ask the vet for a personal limit and respect it.

Signs of heat stress

Early: heavy panting, a wide flat tongue, slowing down, seeking shade, thick saliva. Serious: panting that does not ease with rest, bright red or pale gums, wobbling, glazed eyes, vomiting, diarrhoea, collapse. At the first serious sign, this is an emergency: shade, cool water on the belly, paws and ears (cool, not iced, which constricts blood vessels), small drinks of water, and the nearest vet. Dogs die of heatstroke in minutes, and the ones that survive can have organ damage.

Earlier, shorter, greener

The summer walking routine, in three words. Earlier: the first hour after dawn is the coolest of the day, and after dark is second best; pavement holds heat well into the evening, so 7 p.m. is often worse than 6 a.m. Shorter: half the usual distance, more walks if you like, with water along. Greener: grass, shade, trails, the park rather than the sidewalk. Swimming and shallow water are the best exercise on a hot day for dogs that enjoy them.

Measured, summer walks are slow and short, and their calorie cost is small, which the walk calorie calculator will confirm; that is not a reason to push. Arrange the day around the cool hours with the schedules in A daily dog walking schedule that actually sticks.

Rest days in a heatwave

Some days the honest answer is a potty trip and an air-conditioned afternoon of nosework, a frozen stuffed toy and a training session. That is a rest day, not a failure, and a walking habit that can survive August is one that allows for it on purpose. The rules are in Do dogs need rest days from walking?. The winter version of this guide, with its own chart, is How cold is too cold to walk a dog?.

Frequently asked questions

Can I walk my dog in 90-degree weather?

Only early morning or after dark, on grass, briefly, and not at all for flat-faced, overweight or elderly dogs. At 90°F air, sunlit asphalt can be over 140°F, hot enough to blister pads in under a minute.

What temperature is too hot for a dog's paws?

Pavement above about 120°F burns pads, and pavement reaches that at around 75 to 80°F air temperature in full sun. The test is the back of your hand: if you cannot hold it on the surface for 7 to 10 seconds, your dog cannot walk on it.

What are the signs of heatstroke in dogs?

Heavy panting that does not settle, thick drool, bright red or pale gums, wobbling, vomiting or diarrhoea, and collapse. Move to shade, wet the belly, paws and ears with cool (not iced) water, offer water, and get to a vet: heatstroke kills quickly.

Which dogs overheat fastest?

Flat-faced breeds (Bulldogs, French Bulldogs, Pugs, Boston Terriers, Shih Tzus), overweight dogs, seniors, puppies, thick-coated northern breeds, dark-coated dogs, and any dog with heart or breathing problems. For these, 75 to 80°F is already a caution.

This guide is general information from published veterinary and scientific sources, not veterinary advice. Every dog is different: for exercise, weight or feeding decisions, talk to your vet. Pawdometer never gives diet advice.