Any dog (large or small) has a "normal" temperature of approximately 101.5 This can vary a little either side. But put it this way -if he has a temperature of 102 or more, or lower than 99.5 it is time to see the vet.
But if you're worried he needs to be at the vet.
I'm not a vet by any means but what is the temperature cause what may seem high to us is sometimes normal temp for a dog.