犬の散歩には暑すぎますか？

Is it too hot to walk my dog?

On the Tufts weather scale, heat risk starts to climb around 70°F (21°C). At 75°F (24°C) it's "potentially unsafe" for most dogs, and from 85°F (29°C) every size sits in the top, life-threatening band^[1]. On humid days, read the chart at the heat index ("feels like") temperature^[8]; a flat face, a thick coat or extra weight push the line lower.

Walks matter more than you'd think: in UK vet records, exercise triggered 74.2% of heat-related illness cases^[6], and the RSPCA says dogs are 10 times more likely to get heat-related illness on a hot walk than in a hot car^[3].

Dog heat chart: when it's too hot to walk

Find the temperature on the left and your dog's size across the top. Use the "feels like" (heat index) on humid days.

Then adjust, as Tufts does: one step worse for a flat-faced (brachycephalic) dog, a dog carrying extra weight, a puppy under 6 months or a senior; one step better for shade, and for water they can drink^[1]. "Good" is a score of 0–1, "Take care" 2, "Keep it short" 3, "Skip it" 4–5.

The Tufts scale (Patronek, 1997) is a screening chart that animal welfare officers use to judge risk to dogs kept outdoors^[1]. A walk is shorter than a day outside but harder work, so we use it as a cautious guide, not a timer. Humidity is folded in with the National Weather Service heat index^[8], which is built for people. In the US, "Use my location" fills in the current hour from the National Weather Service forecast^[9]; check it against the sky outside and change anything that's off.

The 7-second pavement test

Press the back of your hand on the pavement for 7 seconds. If you can't hold it there, it's too hot for paws^[5]. (The RSPCA uses 5 seconds^[4]; either way, if it hurts, skip it.)

Pavement heats up far past the air: in Vets Now's figures, at an air temperature of 25°C (77°F) asphalt can reach 52°C (125°F), hot enough to damage skin in about a minute. Natural grass stays coolest^[5].

Signs of heatstroke in dogs

• Heavy panting, or noisy or fast breathing^[3]
• Thick, sticky drool, or red gums and tongue^[3]; dry or sticky gums or an abnormal gum color^[2]
• Weakness, sluggishness, wobbliness, confusion or disorientation^[2][3]
• Vomiting or diarrhea^[3]
• Collapse or seizures^[3]

What to do if your dog overheats

Cool first, then go to the vet^[3]:

1. Stop the walk and get them into shade.
2. Pour cool water over their neck, belly and thighs, and fan them^[3]. Skip the ice, and don't cover them with a wet towel^[2].
3. Call your vet on the way and keep the car cool^[3].

Which dogs overheat fastest?

• Flat-faced breeds like Pugs, Bulldogs and French Bulldogs can't pant as well, and can get into trouble at only moderate heat and humidity^[2][3].
• Thick coats trap heat^[3].
• Puppies and seniors can't regulate their temperature as well^[3].
• Heavier dogs: in a study of UK vet records, dogs weighing more than their breed's average, and breeds such as the Chow Chow, Bulldog and French Bulldog, had higher odds of heat-related illness^[7].

Summer walk tips

• Walk early in the morning or late in the evening^[4][5].
• Stick to grass and shade^[5], and bring water.
• Walk, don't run: skip jogging or cycling with them in the heat^[4].
• A wet cotton bandana, not a frozen one. Soaked in cool tap water, wrung out and tied loosely, it cools a little as it dries, so it helps most on a short walk in dry air. Rewet it every 10 to 15 minutes, and skip the freezer: the AKC advises against putting anything ice-cold on a dog^[10]. It won't prevent heatstroke, and flat-faced, senior or heavier dogs need a cooler plan, not gear^[11]. If they overheat, take it off and cool them with water and moving air^[12].

More in our guides: how hot is too hot for your dog and summer walk tips.

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