How hot is too hot for an outside dog?
If you have a dog that you keep outdoors this is what you need to know. In general, with plenty of fresh water placed in the shade, air circulation and shade for the dog, most dogs can withstand temperatures up to about 90˚F. With little problems. However, there is determined degree, each dog and each location has different circumstances that determine the temperature limit. Alternatively keep your pet inside
What temperature is too hot for a dog?

How hot is too hot for dogs? Heatstroke in dogs is a real risk, just as it is with people and it’s up to you, whether you’re at home or outdoor on a day trip with your dog to make sure your dog stays safe!
With temperatures hovering around 100 degrees, you should try to schedule your dog fun in the early morning or around the water.
Heat Stroke in Dogs:
Paved roads and concrete become griddles during hot weather and, even if they’re cool enough for your dog to walk on safely the heat coming up off those surfaces can be very difficult for your dog, especially for dogs whose bodies are closer to the hot surface.

Heatstroke occurs when a pet’s normal body system cannot keep the body’s temperature within a safe range. Heatstroke can result all sorts of nasty problems, even death in severe cases.
You must take precautionary measures to avoid heatstroke and seek veterinary care if your pet shows signs of overheating.
Pets don’t sweat, they pant and this is a effective cooling system for the dog but you must be careful. Its up to you to provide the dog with shade and water. While wondering how hot is to hot for a outside dog, lets remember in cars the danger increases
How to Prevent Heat Stroke in Dogs:
To prevent your dog from getting a heat stroke you must take care of following points.
• Never leave your pet in your car, even for a short period. Heatstroke can occur when a pet is left in a car even on a 70-degree day.
• Your Rottweiler must have access to shade and an ample amount of water while outside.
• if you are hot they are hot so don’t make your dog except engirt during the hot parts of the day
“Pets are at risk for heatstroke once the outside temperature hits at least 80 degrees and a humidity of at least 90 percent.”

Signs of Heat Stroke in Dogs:
According to the Animal First Aid Chapter of Pet Sitters International (PSI) Certification Program, pets can easily suffer from heatstroke.
“High body temperatures and stress can cause a pet to go into heatstroke,” Ellen Price, PSI academic manager, said. “Heatstroke is most often caused when pets are left in a confined space with little or no ventilation during periods of warm temperatures and high humidity.”
The signs of heatstroke can include:
Uncontrollable panting
Foaming at the mouth
Depression
Lethargy
Agitation
Vomiting
Loss of consciousness
It’s reported that the tongue or gums may turn colors
Primary Cause of Heatstroke in Dogs:
Some breeds and dogs are more likely to overheat. Older dog that are overweight and who have thick fur are the most likely to overheat
Physical Symptoms of Heatstroke in Dogs:
Excessive panting on a hot day is a very good sign that the dog is overheating. You will notice deep heavy panting at a fast rate of speed. It should be alarming. They may also have uncoordinated moments and collapse from exhaustion.
Immediate Care
Remove the dog from the heat into a shaded area or inside with A/C.
Wet your dog with a waterhole or put in a pool of water.
If the dog is unconscious, make sure no water enters the nose or mouth as you follow these steps.
You may have to just pour cool water over the dog using a cup. Just do something!
IF the dog is conscious let it drink cool water. This will drop the temp from the inside out.
Call a vet. for more info visit Humanesociety